(Some sensitive words may have been covered in the previous chapter, and they were blocked, and it may take two days to be released...... ）

There are now broadly two key issues that need to be addressed.

One is how to make a bigger pit on top of the wood that can hold more things, and the other is how to solve the problem of the wooden wedge nailed into the pit and there is no way to pull it out.

Especially the question about wooden wedges in the back.

If this problem is not solved, the oil extraction business will not be able to begin.

Even though the time and effort in the primitive era were not valuable, it took so long to make it time-consuming, and then only made a disposable, and this disposablement could only squeeze out about ten catties of oil.

Even if Han Cheng is accustomed to a slow-paced and inefficient life, he still can't accept it when faced with something disproportionate to effort and labor.

"Miko, can you dig a hole along the trunk of the tree?"

After hearing the news that Han Cheng said that in order to create a pit that could hold more tung oil fruits, thicker trees might have to be cut down, the cat's ears twitched a little with a childish face.

Because it has been a lot of difficulties to put down the current tree completely, if you put another tree thicker than this tree, it will be even more troublesome, not to mention, the tribe's bronze saws are not long enough, and they need to be rebuilt to make longer ones.

Because he didn't want to cut down a bigger tree, the cat ear stared at the thick trunk lying flat on the ground, and began to think about how to make a bigger hole without cutting down a bigger tree.

After thinking about it like this for a while, he really asked him to think of a solution.

After hearing the cat's words, and looking at the thick tree trunk lying flat on the ground, Han Cheng was suddenly awakened.

How did I forget this method!

Digging a wooden pit perpendicular to the trunk of the tree will be greatly limited by the thickness of the trunk itself, but as long as the pit is dug from one end to the other along the direction of the trunk, as the length increases, the pit can become much deeper, and the capacity will naturally increase.

"Good! Good! Cat Ears, your method is so good! ”

Han Cheng, who was full of smiles, patted Maoer's shoulder vigorously, not stingy in complimenting him at all.

Originally, I was still a little apprehensive, but at this time, when I saw that Miko was not only not angry, but also praised himself like this, the little anxiety in my heart had long disappeared, and all that was left was strong joy and excitement.

I've solved a problem myself!

"It's just that after it's erected, it's too high, and you have to stand on the fence and smash the wooden wedge inside."

Wu Wu, who was standing aside and figured out what to do, scratched his head and said in a loud voice.

"It's okay not to stand on the fence, you can build a shelf, stand on the shelf and smash it, just like when we untangle the planks."

The cat ear who was praised was very active at this time, and the whole person was more excited, and immediately gave another solution.

When the tribe saws the tree trunks into planks with a large saw, when they encounter those tree trunks that are too tall, they need to build shelves on both sides of the trunks, and the two of them stand on the shelves and pull the saws vigorously.

So it's not surprising that Cat Er would come up with such a solution at this time.

Han Cheng smiled and waved his hand, there is no need to smash the wooden wedge into it to erect the tree trunk, and it is also possible to smash the tree trunk into it if it is lying flat.

After all, this is something that can be done by one person, unlike a saw pulled by two people.

After Han Cheng said such a method, the eyes of Wu, Cripple, Cat Ear and other people who had surrounded Han Cheng not far from a hundred years ago suddenly lit up, this is indeed a good way.

So Han Chengcheng began to arrange for people to start digging a wooden pit along the intact end of this thick oak wood, and at the same time had people saw off the other end, the section that was destroyed after being dug out of a wooden pit.

When I chose this tree to start with, in addition to the appropriate thickness, there was also a reason that the tree was handsome and tall enough.

Now, even if one more is cut off, the remaining part is still nearly six meters long, which is enough to use.

At this time, Bigfoot's body was no longer in the way, because he found the tung oil fruit and was directly relieved of his slave status by Han Dashenzi, who became a second-level citizen of the tribe, he is now full of energy, and he can't wait to dedicate the whole person to the great construction of the Qingque Tribe.

Therefore, his upper body was fine just now, and he came to Han Cheng, saying that he wanted to go back outside to repair the road.

Han Cheng saw that his body was no longer in trouble, and he was still so active, and after telling him to pay more attention to rest, he agreed.

After seeing that Bigfoot would not be in danger of his life, the few people who sent him back left the tribe the next day and went back to repair the road.

Still, Bigfoot was not alone on his journey, for he was accompanied by some women and minors from the tribe, in addition to some of the trade party.

They went there to pick up some tung avocado and then brought it back.

A group of more than 20 people walked along the newly built road to the west.

They were accompanied by four donkey carts.

The minors sat on the donkey cart, full of novelty and joy, and some people lay on the donkey cart and looked through the gap in the board to see the rapidly receding ground. (No nonsense, just looking through a small gap, the things on the ground retreated really quickly, and it was still a slow ox cart back then)

Some people were lying on the donkey cart looking at the clouds that could not be shaken off and moving with them, while some minors pointed to the unseen scenery on both sides of the road, and they were excited.

The donkey cart went all the way, leaving behind laughter all the way......

Within the tribe, the work of digging holes was stopped again, and problems were encountered again and again.

This time the problem is still more thorny.

The digging of holes in the trunk of the tree went smoothly at first, after all, they had all been tempered into old carpenters, and it was not a problem to dig such a hole, but as the hole deepened, the problem slowly appeared.

As the cave deepened, it became more difficult to dig up, and when the pit was barely reached nearly two meters deep by the lameness, there was no way to dig deeper.

At this time, there were still nearly four meters behind this thick trunk that had not been chiseled.

Even if the tail end needs to be left without chisel, there are still three meters left unchiseled.

"Son of God, forge a longer tool......"

Lame, who is inspired to become a character like Lu Ban, is also anxious this time, and he is determined to dig the hole in this trunk.

After thinking about it, Han Cheng shook his head, it was too troublesome to do this.

And even if you can make a five-meter-long chisel, it is very difficult to use the five-meter-long chisel to carve out a regular hole, which requires too much skill and physical strength from the carpenter.

"Cut this trunk in half, from beginning to end, from the middle."

Han Cheng looked at the limp and said.

"This ......"

Lame looked hesitant, he was worried that after sawing this trunk from the middle with a saw, there would be no way to extract oil, after all, when digging that wooden pit to extract oil, Miko deliberately told not to break it.

And they themselves felt that if they got this thing away, it would probably not be possible to use it to extract oil, because when they drove the wooden wedge into it, it was very strong.

"It's okay, let's see it and try it."

After understanding the lameness's concern, Han Cheng smiled and waved his hand and said.

For this kind of oil press used for manual oil extraction, Han Cheng has never been in contact with it before, and now he can also come to it tentatively, learning while fighting.

In front of me, I had encountered difficulties in digging a tree pit, and I had reached the point where I could not continue digging deeper without breaking it open.

At this time, there is nothing else to think of but to get it out of the way.

As for how to make these two pieces of wood together again after it is broken, that is what needs to be solved after it is broken.

Limp and take orders.

So, it didn't take long for the battered trunk to 'stand' again, and then two people who often pulled the big saw began to stand on the erected shelf, pushing and pulling and sawing from the top down......

After the trunk had been broken in half, it was easy to start chiseling again, and several carpenters chiseled there in batches according to the lines drawn by the lame, and the progress was four or five times better than before.

However, although the progress has improved so much, the people who are working on the lime do not feel much excitement, because they are all faintly worried about what is going to happen, I am afraid that the trunk that has been sawn from the middle will not be useful when it is closed again.

After more than two days of polishing, the two halves of the trunk were completely removed, each with a semicircle on top, which, when combined, became a hollow cylinder inside.

"How about getting some tung avocado."

Lame wanted to find a way to glue them together as much as possible, Han Cheng thought about it and didn't let it, but asked people to directly start to put tung oil fruit in it for experiments.

Because the tree is thick enough, even if some of it is removed, the rest is very heavy.

Now one is pressed on top of the other, much heavier than the legendary coffin lid.

Han Cheng wanted to try if he could withstand this kind of support just by virtue of his own weight, and if he could carry it, it would be even better, and he could save a lot of trouble.

The people who went to the place where the road was built to collect tung avocals had returned, and they had pulled as many as four donkey carts, and those who followed them did not come back empty-handed, and they all carried them more or less with them in their hands.

If you can get the 'oil press' right, just the tung oil fruit that the tribe got back this time, the oil squeezed out can basically be used to brush the rattan armor.

Under Han Cheng's explanation, after going through the procedures of stir-frying, shelling, mashing, and wrapping, a package wrapped in fried tung oil powder was filled into the oil press that was placed horizontally here and I didn't know if it could be used.

This time, two packages of tung oil powder were filled into it, almost more than 30 catties.

After pushing them to the ground with a stick, as in the previous unsuccessful experiment, a round wooden board about the thickness of the interior was filled into it.

After these alleys, they began to put wooden sticks into it one by one, and when the wooden sticks were stuffed to a certain amount, they began to use the bronze hammer after they were not easy to stuff with their hands.

"Knock Knock Knock ......"

The sound of hammers hitting wooden sticks and nailing them into it continued to sound, and there was silence all around, and everyone looked at the modified oil press, waiting for a miracle to happen.

The lame and cat ears, who participated in the whole process, didn't even dare to come out of the atmosphere, their eyes stared without blinking, and their hearts hung up, for fear that something would go wrong.

However, mistakes still occurred.

It turns out that the coffin lid cannot be nailed tightly without nails.

At the beginning, the support was not particularly large, relying on its own heavy weight, the half of the tree trunk pressed on it could still not move at all, but as these sticks were constantly nailed inside, the support inside became more and more powerful, and the upper half of the trunk was finally supported up by the gap.

"Alas~"

The lame and the others sighed in unison, feeling very disappointed by such a result.

Although Han Cheng was also a little disappointed in his heart, it was not big, after all, this thing was groped from scratch, and it was possible for any kind of mistake to occur in the middle.

Immediately, the board on top was lifted up, and after the stick was removed, it was reloaded.

This method of sawing the trunk in half was conceived to solve the difficulty of digging a pit, and at this time, the difficulty of taking out the wooden stake nailed into it was also solved by accident.

No matter how firmly these sticks hold inside, just pull the upper half of the trunk apart, and the strength will disappear immediately, and the firmly held trunk will become loose.

After filling these things again, Han Cheng asked people to find some tough vines and tied them firmly, binding as many as a dozen or so ways.

Once this is done, proceed to fill in the stakes, which are then hammered into them with a bronze hammer.

"Oil! Oil! There is oil! ”

This time with these vines for restraint, as the stump continued to be nailed in, the upper half of the trunk was not stretched.

After smashing like this for a while, a sharp-eyed person pointed to the bottom of the simple oil press and shouted in surprise.

Seeing this, Han Cheng and the others around him all looked there.

This look immediately made Han Cheng happy, and he saw a drop of yellowish oil, flowing out of the hole drilled in advance at the bottom of the simple oil press, and then dripping into the clay pot below.

Such a scene was not very beautiful, but Han Cheng looked at it with a smile on his face, and the lame and cat ears, who had participated in the whole process of making this simple or simple oil press, even jumped and cheered loudly.

The second senior brother, who was carrying a bronze hammer and knocking on the stump, looked down at the drops of oil dripping down, grinned, and held the bronze hammer with both hands to increase the force, and struck again and again.

With the increase of the extrusion force, more oil comes out, from the beginning of the drop to the down, into a thin line, constantly dripping into the clay pot below, from less to more.

There was a cheer all around, and everyone had a happy and uplifting smile on their faces.

That's what success looks like!

Before success, it often takes a lot of effort, a lot of pain, and patience, but when all this is over, and success really comes, everything that has been paid before has turned into heartfelt joy.

And the more people who give and the more they go through, the more joy they get at this time.

This can be deeply experienced as long as you look at the lame that is more happy than the limp that the people with nimble legs and feet jump high.

Because of the appearance of this oil, the whole tribe suddenly became a sea of joy.

Under the bombardment of the second senior brother hammer after hammer, these tung avocado powder was squeezed more porcelain, and the oil contained in it continued to flow out, bringing together a piece of amber in the clay pot.

"Stir-fry tung apocalypse, peel tung avocados, mash and squeeze oil!"

Han Cheng howled excitedly, and the people around him also shouted excitedly: "Squeeze oil!" Oil-squeezed! ”

Then there was a jubilant and busy scene, everyone fried tung avocado, peeled and smashed, and the interest was very high.

And here, after nothing of the oil dripped from it, Han Cheng began to fill the jar with the tung oil collected in the clay pot.

Then weigh it with a scale, and after removing the weight of the jar itself, this time the oil obtained was a little more than five catties.

This time, about 35 catties of tung oil fruit powder were put into it, that is to say, the oil yield was about one-seventh by squeezing tung oil in this way.

This kind of oil yield is not high, and there must be a lot of oil that has not been squeezed out in the oil residue that was poured aside from these two balls, but this is no longer relevant to Han Cheng now.

As long as you can squeeze out most of the oil in it, there will be no problem, as for the rest, waste a little bit, waste a little, who let themselves get out of the oil press is so rough, and the tung oil fruit resources there are so sufficient?!

At this moment, four words appeared on the face of Han Dashenzi, who looked at the tung oil in the jar in his hand and looked extraordinarily heroic, that is, rich and capricious.

After everyone's busyness, more tung oil nuts were processed, and this time there were more put in it, a full three hundred and fifty catties!

In order to put more tung oil powder into it, this time these tung oil packages were not loosely packed in as before, but were trampled on with their feet and stepped into a cake shape.

It's just that in this way, new problems arise.

The problem is that these cakes that have been trampled out by people are of different sizes, one sticks to the other, after the big is large, the small is small, and there will be a lot of gaps in the middle, in this case, many places can not be squeezed in the next oil extraction, which will greatly affect the oil yield.

After Han Cheng stood here and scratched his scalp for a while, he came up with a solution.

He called the limp over and asked him to weave circles of the same size out of bamboo strips.

The halos woven by these bamboo strips are forty-five centimeters in diameter and four centimeters thick.

With these circles of the same size, the situation of different sizes and thicknesses of the cake is solved at once.

When making oil cakes, you only need to spread the fine linen cloth on the ground first, then put the circle on the fine linen, and then continue to fill it with tung avocado powder, almost later, and then fold the excess linen in half, step on it with your feet, and tie the corners of the fine linen cloth to each other.

And because there is a relatively hard bamboo circle on the outside, after the cake is erected, the cake will not be as easy to deform as before.

With the experience of the previous time, this time when I put the bread inside, I did not first close the 'lid' and tie it up after it was dead, but first arranged the cakes one by one on the side below, and leaned the round plank against the end, and after all this was done, I covered the top half of the trunk and tied it tightly with strong vines.

"Start squeezing oil!"

Han Cheng shouted, and several people began to fill in the wooden stakes one by one.

Because there is a lot more tung avocado powder in it this time than before, this time the stakes are long on the outside.

"Bang! Bang! ……”

After filling it tightly, the second senior brother shook his spirits and began to smash the wooden stake with a bronze hammer in his hand.

At first, the stake went into it very quickly, but as the number of smashes increased, the speed began to slow down, but in contrast to the tung oil dripping from the bottom of the oil press.

This time, the tung avocado powder was very sufficient, ten times that of the first time, so after the second senior brother continued to wave the hammer for a while, the tung oil that was originally dripping down directly turned into a trickle, dripping into the clay pot below.

Such a scene, Han Cheng and others who watched it smiled happily.

The second senior brother also shook his spirits, smashing down one hammer after another, constantly squeezing these tung oil powders.

After all, people's strength is limited, and after the second senior brother smashed it for a while, he was tired and panting, and the strength of the hammer he swung out was not as strong as before, so the senior brother stepped forward to take over......

Looking at this pot full of tung oil, Han Cheng and the others were extremely happy.

With these tung oils, the Divine Son will finally be able to start brushing the rattan armor, and the quality of the vine armor of his own tribe will finally be able to go further!

The joy in Han Cheng's heart became a little lighter after weighing the tung oil squeezed out this time in batches, and after adding it up.

These tung oils look a lot in the basin, but after weighing, they are only thirty-five catties.

According to the oil yield recorded in the last experiment, you should get 50 catties of oil this time.

Even if all the fruits in this batch are not as full as the batch used for experiments in the previous batch, it is impossible to differ so much, it is directly less than fifteen catties!

Where did these fifteen catties of oil go?

"Smash it again."

After thinking for a while, Han Cheng said to the second senior brother who had recovered a lot, and the second senior brother picked up the hammer and continued to smash the wooden stake.

It's just that under his constant smashing, the stake has basically stopped entering inside, and only a few drops of oil dripping from it.

"Miko, there's no oil in it."

Wu said on the side, but Yuan didn't follow, but looked thoughtful.

After nearly a year of shock and edification by the Qingque tribe, today's circle has been initially introduced into the world of mathematics by Han Cheng.

From Han Cheng's weighing just now, she also saw some doorways.

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