PS, reiterate the important news, guarantee the bottom five watches, and the monthly pass will accumulate two hundred and add a chapter on the basis of the five watches, and the promise will still work!

So brothers, smash the monthly pass, try if the saury can't catch it!

……

In the memory of the vast majority of people, landlord is definitely a derogatory term.

When these two words are mentioned, many people may involuntarily think of an image of a thin old man wearing a silk dress, wearing a small hat, with a sparse beard, and a treacherous and obscene face.

But facts often deviate from memory in some way.

At least in terms of the obsession with the land, the landlord has the same deep love as the ordinary people who live on the land.

Anyway, the impression given to Zhang Ran by the landlords of Ma Chengbang, Zhao Wanlin, Zheng Tianming, etc., is like this.

These landlords seem to be pampered, but they are absolutely not overwhelmed by any crop work in the fields, even more than many of the old croppers.

It has been several days since the sulfuric acid came out and the phosphate rock was excavated.

But these guys have no intention of leaving at all, they carry hoes every day and follow everyone to dig stones, and they will never stop if they don't watch the first piece of phosphate rock dig out with everyone, even if their hands are full of blood and they are good and broken, they don't care.

Of course, for Zhang Ran, this situation is what he is happy to see.

After all, with the leading role of several landlords, all the ordinary people involved in the mining of phosphate ore are enthusiastic, and there is no need for Wang Changtian, Lu Yan and others to urge, a group of people are wearing stars and moons, and even sometimes they can't sleep at night and can't help but go to two hoes.

Of course, what made Zhang Ran happiest was that these landlords were extremely generous in the past two days, bringing two big fat pigs to the detachment, and calling the detachment's canteen to improve the food for the people.

The copper smelter continues to produce, sulfuric acid, ammonia, are constantly being produced.

Although these pitch-black sulfuric acids are no different from waste products for the preparation of nitrifying explosives, after the tower cylinder and all aspects of the process have been improved, they must be thoroughly cleaned and re-added with mother acid to produce a new round of experiments.

Fortunately, when the mother acid is prepared at one time, it only needs to add the mother acid for the first time, and then repeatedly spray and absorb to increase the concentration of sulfuric acid, without the need to continuously add the mother acid.

Otherwise, the mother acid alone, the little mother acid that the detachment worked so hard to get back would not be enough at all.

In the past two days, Zhang Ran has devoted himself to the ratio of ammonia.

He tossed several small experimental plots of the detachment, and two of the crops withered directly after watering the proportioned ammonia, because the concentration of ammonia was too high, which directly burned the roots of the crops.

There are still two crops that are not dead, but the whole plant is showing an abnormal blue and black color, whether it is Ma Chengbang and other landlords or Wang Changtian Lu Yan and other good crops who have served the crops for I don't know how many years, they only glanced at it, indicating that this is excessive fertility, and in the future, these crops will only grow seedlings and not produce grain.

After repeated experiments, Zhang Ran set the ratio of ammonia water at one part ammonia to three parts of water, began to try to water three acres of land, and then slowly observed.

As a result, this experimental field has become a sacred place in everyone's hearts.

Every day after eating, after finishing work, you can see a group of ordinary people and Ma Chengbang and other landlords holding rice bowls or smoking pots and squatting on the ridges without any image, that posture is indescribable.

Anyway, every time he saw a group of people in this posture, Zhang Ran couldn't help but feel a surge of stools, and he had the urge to go to the thatched house to squat immediately.

Back Mountain.

More than a dozen grass targets are distributed more than ten meters away.

Mao Drill handed a few grenade mines to Zhang Ran.

There is no obvious change in the appearance of these grenade mines, but Zhang Ran knows that the craftsmanship has been improved by Mao Zuan and Cheng Dongguo Niu Da and others, and it is much more mature in all aspects than the first batch of grenade technology.

Among them, in addition to following Zhang Ran's requirements,. In addition to good drugs such as T, picric acid, etc., even the hair pulling device has made a new attempt, abandoning the more unstable white phosphorus mixed fire, using a small iron pipe filled with a mixture of sulfur powder, porcelain powder and copper wire to pull the fire.

"This hair pulling device, I learned from the grenades I captured last time, is much safer than the white phosphorus we used before, and most importantly, it is less susceptible to weather conditions......

When Mao Zuan said this, his expression was full of a sense of accomplishment, and Zhang Ran felt that there was a bit of sacredness in his eyes.

Thundered......

The thunderbolt-like explosion on a sunny day was so violent that it made the ear drums hurt!

Because of the reduction in the amount of black powder, the black smoke is obviously a little less than the explosion of the previous grenade, but the power is obviously increased a lot!

On the nearest grass targets, there are traces of shrapnel directly penetrating them, and on the grass targets more than ten meters away from the explosion point, there are cracks cut by shrapnel......

This has never happened before when it was filled with pure black powder!

"Dog's day, the explosives invented by foreign devils are much more ...... than our black powder cowhides."

Mao Diamond and several apprentices looked at this scene quite stupidly, that is, adding a small amount of good medicine to black powder has increased the power so much, so how powerful it is to add all good medicine, you can know it with your ass.

They have a kind of frustration that their IQ is rubbed.

"The little devil's explosives are just picking up the teeth of our ancestors' black powder - when our ancestors invented black powder, those foreign devils didn't know where to eat......"

Zhang Ran had to bring out the wisdom of his ancestors to comfort these guys and said: "In terms of cleverness, those foreign devils can't catch up with us, so you can't be arrogant, as long as you study hard, it's not a matter of minutes to surpass those dead foreign devils......

"That's right!"

Hearing this, Mao Diamond and the others were obviously a lot happier, and happily collected shrapnel everywhere.

Zhang Ran grinned, and said in his heart, it's good that this ancestor is too wide......

If it weren't for the long faces of the ancestors, I wouldn't have known how to comfort these guys just now.

After improving the process and adding some high explosives, the power increase of the grenade is all-round.

Not only has the penetration and cutting power of the explosives increased a lot, but the radius of the explosion has also increased from four or five meters to eight or nine meters, and the number of explosive chips has been substantially improved - a full twenty-five or six explosive chips, which is more than double the previous eleven or twelve pieces!

Although it is incomparable with the historical Eighth Route Army troops who can explode fifty or sixty pieces of explosives purely by black powder, and there is still a gap between the explosion radius of regular grenades reaching fifteen meters, and it can be said that they will die within five meters, but compared with the first batch of grenades, the power is really much enhanced.

Similarly, the power of clay pot mines has increased considerably.

After the explosion, the lower part of several nearby grass targets became a hornet's nest from the inside out, which was shocking to look at.

Zhang Ran believes that as long as the enemy steps on the detachment's mine again, as in the Lingjiang Fortress before, in addition to wanting the little devil to blow up into Bao Gong, he still has the strength to continue to chase and scold his mother, it is estimated that it will not happen again!

Even if you can't blow it up, you have a lot of confidence that those guys will become eunuchs!

Anyway, looking at the situation of the lower half of the grass target, and looking at the extremely obscene sneering appearance of Mao Drill and several apprentices, Zhang Ran felt a cold ......

"The effect is good, so according to this kind of power, we will first produce a batch and supply the detachment's battle plan for Cangshui!"

After the experiment, Zhang Ran nodded with satisfaction, and at the same time encouraged Mao Ran and the others to make persistent efforts to gradually increase the power of grenade mines, and strive to reach the power of standard grenades as soon as possible, or even exceed standard grenades.

Then Zhang Ran went to the second workshop.

"I've already asked people to inquire about the punch, Director Cheng, you don't need to urge, I've always remembered it!"

As soon as he saw Cheng Dongshan seeing that he wanted to speak and stopped, Zhang Ran hurriedly spoke first, blocking the words that came to this guy's mouth, and then asked about the research and development of bearings.

"It's hard......"

Cheng Dongguo sighed, looked at Cui Sanyuan and several fitter apprentices filing steel balls every day, trimming the arms of the inner and outer steel ring files were swollen and sighed: "It is too difficult to get steel balls with round specifications and highly consistent precision!" ”

Once the steel ball is not round enough and the accuracy is not high enough, then all the steel balls will increase friction in the steel ring, so that the bearing can not run smoothly according to the concentric circle, and the rotation will not only save effort, but may also be more laborious than directly hitting the hard.

"Master Niu, bring me the mold of the steel ball inverted mold!"

Zhang Ran checked a few unqualified bearing scraps made by a group of people in the second workshop working overtime in the past few days, and asked Niu Da to take the mold.

This mold was obviously also poured with molten steel, and then repaired by hand for Cui Sanyuan and other fitters.

After the mold is repaired, the oil is brushed in the mold, the steel balls are poured with molten steel, and then Cui Sanyuan and other fitters are allowed to polish it.

In terms of the casting of steel balls, Zhang Ran did not have too many suggestions, but put forward another idea: "It is not necessary to use steel balls, let's transform the bearing steel ring, and we can also use steel columns instead of steel balls - concentric steel columns instead of steel balls, will the difficulty of making them be slightly lower?" ”

"Oh Captain, why didn't you say it earlier!"

As soon as they heard this, Cheng Dongguo, Cui Sanyuan and the others suddenly screamed in disgust, and at the same time, they looked annoyed that they couldn't have imagined it, saying that Zhang Ran was a little smarter than them, and hoped that Zhang Ran could come over more to guide and guide the work in the future......

The steel ball needs to be fully round, while the steel column only needs a rounded surface - the difficulty is self-explanatory.

was praised by everyone like this, Zhang Ran was full of comfort.

Even if he knew that he had proposed this method of steel column bearing, it was not because he was really smarter than them, but because he had seen it before.