The craftsman continued: "According to the rules of the original workshop, three feet is one meter, one-tenth of a meter is a decimeter, one hundredth is a centimeter, one thousandth is a millimeter, and one hundredth of a hundred thousand is silk. ”

"This thing?" Li Shimin handed the caliper back.

"Back to the words of the saint, the accuracy of this ruler is 1/10,000, that is, ten filaments. There are two handfuls in the chief craftsman's room that can be accurate to the wire, and the non-extremely precision steel parts do not need to be used, and the accuracy of this shaft only requires an error of 30 wires to be a good product. ”

"Good." Although Li Shimin is not a craftsman, he can hear how difficult it is to make such a precise request.

Li Shimin waved his hand and motioned for the craftsman to continue working, and asked Li Bi to take him to other places to have a look.

Li Bi followed, and said on the side: "Sage, these machines seem ordinary, but when the machinery is completed, the iron donkey can produce one per day, and the strength is several times that of the existing one. ”

Li Biyi stretched out his hand and took a pair of ear protectors from the hands of his subordinates, and then handed them to Li Shiji: "Sage, please wear this, the next thing you are going to is one of the three most important workshops, reforging." ”

Without a steam engine, there would never have been heavy forging.

Before entering the workshop, Li Shimin stopped, his eyes were deeply attracted, and he immediately asked, "What is that?" ”

Several of the guards immediately scattered around, their hands on the hilts of their swords, their eyes like arrows.

I saw a large cart pulling fourteen large carts, each of which was a square cart five feet long and five feet wide, with a heavy metal part piled on it.

These were originally nothing, but in front of them was a small locomotive.

This is just a powerful iron bull steam engine, which was converted into a small train by Li Dejian and others. It was originally an experimental product, but this thing, combined with the rails, was too useful for a steel mill with too many overweight parts.

Soon, the little train was turned into a small transfer train between the squares.

The speed is not fast, the limit speed is forty miles per hour, and the modern algorithm is ten kilometers per hour. But it pulls a lot, very heavy, the big board car on the fourteen rails can pull up to the limit of close to fifty tons, and usually easily pull up to thirty tons.

In the Tang Dynasty, it was said that it was the weight of a thousand stones.

Li Bi didn't dare to let the Tang Emperor Li Shimin get close, the iron parts on the cart were very heavy, and it was not a minor injury to touch someone casually.

What's more, the locomotive is still an experimental product, and it leaked gas once a few days ago.

"Saint, saint, this is just a test piece, a test piece."

Li Shimin pushed Li Bi away.

The Tang Emperor wants to see who dares to block it.

Li Bi had no choice but to let the donkey pull away the cart that transported the goods, and then left two sections.

A chair was added to everything, and the small train was driven to pull Li Shimin around the workshop area, and Li Shimin was smiling.

Li Shimin came to Huayuan only to encourage, reward, and hope to increase production.

Seeing this little train, which was called a small toy by willow wood, Li Shimin circled around the workshop area in the entire forbidden area three times, and then laughed with satisfaction.

If the small train is Li Shimin's inner expectation, then the heavy forging machine is the shock.

A huge piece of red-hot iron is like a dough, and it is ready to be kneaded.

It was a piece of iron that was 100 catties long, and Li Shimin opened his mouth wide and couldn't make a sound in surprise.

"Sage, it took us a year and a half to build this machine. This is a machine for the production of several main transmission parts of the dragon car, which is still being improved and debugged, and will become the main force of iron donkey production in three months at most. ”

"Good, good, good." Li Shimin said three good words in a row.

The nervous look on Li Bi's face disappeared at this time, and he breathed a sigh of relief.

Li Shimin turned his head to look at Li Bi, and Li Bi's originally relaxed mood that was staring at him instantly tightened again. Li Shimin asked: "If you do a good job in the iron donkey matter, you will be rewarded for your merits." So is there any progress on the dragon car? ”

Li Bi gritted his teeth: "Sage, please move." ”

If someone else came over, Li Bi would definitely not say it, but this was the Tang Emperor, and Li Bi didn't dare not answer.

In the next place, there is a post in three steps, a sentry in five steps, and even a bed crossbow on the high wall, and a small general's cannon. This is the forbidden area within the forbidden area, which can be said to be the pinnacle of Datang Industry.

Liu Mu made it very clear to Li Dejian that the steam engine had reached a bottleneck, and there was only one way to break through this bottleneck, which was to upgrade the overall industrial level, various machines, steel formulas, etc., and then improve it to a higher level, so that it was possible to make a larger small marine steam engine.

Next, if the overall industrial level is improved, then it is estimated that the steam engine for trains will be possible.

If it still can't be built, then the overall industrial level will be improved again.

It is not a steam engine that is being studied here, but a rolling mill.

When Li Shimin arrived, steel bars were rolling out one after another.

Li Dejian was busy, Li Shimin didn't let anyone disturb him, and waited for Li Dejian to be busy for half an hour before he asked Li Bi to call him closer.

"Sage."

"What kind of machine is this?"

"Back to the words of the saints, this is called a rolling mill. Datang's existing rolling mills are too clumsy and the production efficiency is too low. This is the sixteenth improved rolling mill and is already capable of producing rail No. 3. ”

Li Shimin asked: "What kind of steel rails are used in the real fire dragon car." ”

"The heavy truck is the number ten in the design of the willow horse, that is, every three feet of rail weighs one stone. When the No. 4 rail is reached, the ordinary light dragon car can be used, that is, every three feet and forty catties. ”

"Where's the front of the car?"

"I think it will take some time, and there are still many difficulties to solve. What's more, it also takes a cycle for the rail to reach mass production. ”

Li Shimin nodded: "I'm not urging you, but I have something to look forward to." ”

"The minister understands, and the minister is also looking forward to it. Walk on the saints. ”

Li Dejian showed Li Shimin a miracle-like technology, alkyne oxygen welding!

"Sage, water freezes at zero degrees, and water turns into water vapor at 100 degrees, and by this standard, iron melts at 1,350 degrees, and steel melts to 1,400 to 1,500 degrees, depending on its subtle material. And the temperature of this flame can be close to 3,000 degrees, and it can easily melt steel. ”

Li Dejian asked a craftsman to show how to cut a steel plate at once.

Then Li Dejian said: "Sage, craftsmen are researching new solders, as long as the solder joint material is solved, it will be a big step forward for making fire dragons." ”

Next, the entire inner forbidden area, the more Li Shimin looked at it, the more shocked he became.

Li Shimin heard the word industrialization, but what he really saw was extremely shocked, whoever has industrialization first will own the world. This is Yanagiki's remarks, and it can be proven in history.