At noon the next day, Han Rui woke up with a headache and a swollen brain.

This pre-Western liquor may be because the distillation technology is not up to standard, so it looks extremely cloudy, and there is no very pungent alcohol smell when drinking.

But the strength of the wine is not inferior to the liquor of later generations, and the feeling after waking up with a hangover is even worse!

Rubbing his temples, Han Rui got up from the collapse and looked inside the room.

The last scene in my memory was when Li Si supported Han Rui's creaking nest and sent him to the guest room of the wine shop to rest; Then he left with a drunken mulberry on his back.

Sangji drank too much last night.

It may seem strange to say this, because everyone has drunk too much...

But compared with Li Si, who can still walk, and Han Rui, who can still keep his memory, Sang Ji is completely drunk.

At the wine table, Sang Ji said a lot of words hidden in his heart - the breakdown of his family really hit him hard.

Think about it: Sang Ji was originally a wealthy businessman, born with a golden key, and lived a beautiful life of opening his mouth with food and clothes when he was a child.

The family relationship sent him to the clouds to be a doorman, and I thought that he would also use this as a way to give Sang Ji the opportunity to develop in the direction of an officer.

But together with the war, Sang's decades-old foundation instantly came to naught - wealth was robbed by the Huns, and women and children were taken away by the Huns; Even the only remaining mansion was reduced to ashes by a fire when the Huns retreated...

Han Rui still can't forget that even if Sang Ji was drunk and fell under the table, he couldn't sit up, and he still muttered the lofty ideal of 'not killing all the Huns, swearing not to be a man'...

Although Han Rui couldn't get Sang Ji's point, he still felt sad for his comrades who had suffered such a catastrophe.

After shaking his swollen and aching head, calling the little maid to bring hot water, and washing up briefly, Han Rui walked out of the inn and walked towards Tian's courtyard.

Han Rui really didn't want to go back to Cloud City again, and he was called and drunk by Luan Bu's old thing!

Anyway, when the bearings are made, the day of getting out is not far off; In Yangshou, he has no relatives and has nothing to do, so it is good to urge Tian Zeng's progress.

Stepping into the small courtyard, there was no Sang Ji, but Li Si was carrying waste wood in the courtyard.

Seeing Han Rui entering, he casually said hello, made an appointment to have dinner together in the evening, and went about his own business.

The corners of Han Rui's mouth twitched, rubbed his stomach that was still tumbling, and ran to the backyard as if he had escaped.

The wooden strips that filled the courtyard yesterday are gone, and I think they have been made and taken away.

Tian Zeng sat alone under the crooked neck tree, holding the 'drawings' left by Han Rui yesterday, sometimes frowning and sometimes nodding, his face full of confusion.

Seeing Han Rui coming, he summoned him to sit down beside him and asked, "The principle of this thing is the same as that of rolling wood?" ”

Han Rui was noncommittal, and Tian Zeng pointed to the iron balls in the two rings of the bearing: "Replace the hobbing wood with iron balls, but in order to fix it with grooves?" ”

The more Han Rui listened, the happier he became, and his nodding looked like a chicken pecking rice.

Tian Zeng nodded slightly, looking at the schematic diagram in his hand: "You said yesterday that you came from the clouds?" ”

"But the blacksmith of the King of West Street asked you to come to me?"

Han Rui bowed his hand and said, "Exactly." ”

"The old man looked at the drawings drawn by the boy, and said that this thing was too fine to be made, so he asked the younger generation to come to visit."

"I wonder what Tian Gong might do?"

Tian Zeng's face sank: "Useless thing!" ”

"I can't make such a thing, it's in vain that I taught him so many years!"

Han Rui couldn't care less about being surprised, Tian Zeng scolded Wang Blacksmith, who was at least twenty years older than him, for being 'useless', and barely suppressed his excitement, Zheng Zhong bowed and said, "Please also ask the old man to give it a try; After the deed is completed, the younger generations will be grateful. ”

Tian Zeng waved his hand.

Just when Han Rui was pleasantly surprised that he didn't want money, he muttered to break his illusion.

"You paid for it, so I naturally had to make it."

Fu looked at the drawings for a long time, said 'wait here,' and got up and walked back to the house.

About two hours later, Han Rui, who was sleepy, walked out of the house, and the wooden ring in his hand shocked Han Rui's spiritual platform!

Bearing!

Although it is wooden, it looks exactly like what Han Rui painted!

More than a dozen wooden beads are tightly sandwiched between the inner and outer rings, but they can also roll with the relative movement of the inner and outer rings.

Han Rui stepped forward quickly, took over the 'concept version' of the wooden bearing, and his eyes were brilliant!

Just this wooden bearing in your hand, if you don't consider the lifespan, you can also use it!

After a closer look, Han Rui threw himself into the ground for Tian Zeng's craftsmanship.

The inner ring and the bead are similar to what they imagined, and they should be made of cork, which is not surprising; What really impressed Han Rui was the outer ring!

Tian Zeng cut the outer ring according to the picture and sawed it into two circles from the middle of the cut surface!

The process of making this wooden bearing has appeared in Han Rui's mind: fix the bead between the inner ring and the half outer ring, and then cover the other half of the outer ring; In this way, the two halves of the outer ring are joined together to form an inner groove that holds the bead in place.

Then use wooden nails to nail the two outer rings together, which perfectly solves the problem that the balls can't be put in!

Han Rui's face was full of excitement and said, "It's exactly this!" ”

"Tian Gong may make iron?"

After thinking about it for a long time, Tian Zeng still shook his head and said, "I can only make this thing wooden." ’

The ignited hope was poured with cold water again, Han Rui was disappointed, and immediately said excitedly: "How come? ”

"Tian Gong has already solved the problem of the beads, how can he not do it?"

Tian Zeng sighed, shook his head and said, "Iron ring, I made it myself; Iron beads can be made with a little more time. ”

"The problem is the grooves in the ring."

"Wooden rings, grooves can be cut with a knife; If it is an iron ring, the groove is not available. ”

He immediately teased, "If you can find a knife that can sharpen iron at will, maybe I can make it." ”

"Otherwise, you'll have to do it with wooden rings."

Han Rui was disappointed when he heard this, and brainstormed without giving up, and many strange ideas poured into his mind, but in the end they were unrealistic.

The problem now is to make grooves inside and outside the ring that fit the spherical surface.

Make a grinder?

The grinding block of iron must be made of steel; If there was steel, how could Han Rui try to make iron bearings?

If you use a whetstone, it is even worse; The meaning of "iron pestle sharpened into a needle" is perseverance and perseverance, but it is not used to make luxury!

The more Han Rui thought about it, the more irritated he became, so he could only sit down and fall into deeper thought.

If anyone can see the scene in Han Rui's mind at this time, they will definitely feel new to the strange scene of the two villains talking!

The two villains asked and answered, and Han Rui, as a bystander, tried to find a solution to the problem from the dialogue between the two villains.

The principle of the bearing comes from the rolling wood and the plank, and there is no groove on the board, so why does the bearing have to have a groove?

Because the bead between the two rings needs to be fixed.

Why don't planks need grooves?

Because the planks are made of rolling wood, there is no need to fix them.

Han Rui was overjoyed, and vaguely felt that he had touched the corner of the answer.

If the beads are replaced with peg-shaped 'rolling logs', that is, cylinders, then...

Still need to be fixed!

Otherwise, the cylinder will fall out from between the two rings...

Enduring his frustration, Han Rui forced himself to return to his previous state.

Why do I have to use grooves to fix it?

Because the balls need grooves to wrap around.

So if you don't use beads, but cylinders, how do you fix them?

It can't be fixed.

Why?

Because there are only two ways to fix: concave and convex: groove to fix the sphere; The bump fixes the hourglass-shaped shape with thick ends and thin middle.

Protrusion···

Hourglass···

Thick at both ends, thin in the middle...

Han Rui's mind was confused, and these words kept switching like a slide.

I feel that there is only a thin film left from the truth, but I can't break it.

The groove is not good, only the bump can be used; Between the two rings must be an hourglass-like body.

Hourglass-like, cylindrical···

In an instant, Han Rui's mind felt as if he was struck by a bolt of lightning!

Pregnant!

Dig a groove in the middle of the cylinder, and protrude a circle of corresponding bumps on the iron ring, won't the problem be solved?

Iron cylinders are definitely better than iron beads!

A circle of fine grooves is also much easier than chiseling spherical grooves on the inner and outer rings, and it can be knocked out with a nail alignment!

As for the bumps inside and outside the iron ring, Han Rui originally didn't expect it, but after remembering that Fang Caitian had divided the outer ring into two parts and connected them with nails, he instantly had an idea!

First, make the inner and outer rings and small cylinders; A groove is chiseled in the center of each cylinder and placed between the inner and outer rings.

Then directly from the outside of the outer ring, the inside of the inner ring, along the corresponding part of the bead groove, smash a circle of nails that are slightly longer than the width of the ring!

If you can't smash it, then drill a hole in the ring in advance, insert a nail, and then wrap a layer of iron sheet in the nail!

All problems solved perfectly!

Although the process has increased greatly, the process of polishing the iron beads that originally took more than ten days has been abandoned, and in fact, the time taken has not increased, and it is very likely that it is even shorter!

Han Rui never felt that his brain was so creative!

Hurriedly got up, and didn't care about the dirt on his clothes, so he poured his thoughts to Tian Zeng.

Maybe Han Rui used too many words in later generations, Tian Zeng didn't understand it, and his face was confused.

Seeing that Han Rui was getting more and more excited because he didn't understand, Tian Zeng had no choice but to soothe: "In this way, you say, I'll do a little, how about it?" ”

Han Rui nodded, and when Tian Zeng took out a large piece of cork and a carving knife, he said, "Carve out the inner and outer rings, and there is no need to have grooves." ”

Tian Zeng nodded, took out a rope, nailed one end into the wooden block and fixed it, turning the other end while drawing a line along the trajectory of the other end.

Looking at the almost perfect circle on the wooden block, Han Rui was secretly surprised: it turned out that there was already a primitive compass at this time!

Half an hour later, Tian Zeng cut the inner and outer rings and looked at Han Rui.

"With the distance between the two rings as the diameter, the pillar like a stick is carved."

The next scene that happened once again made Han Rui stunned!

Tian Zeng held the two rings in the direction and used the rope to get the farthest point from the intersection of the two rings!

The diameter of the future generations was also obtained in this way!