Everyone looked at Zhang Hao, and from time to time glanced at Zhang Shengye next to him. It's a bit too much to ask someone about the principle of their weapon. But everyone was really shocked.

In particular, the crossbow arrow, without tail feathers, can still move straight forward, which is a bit beyond everyone's understanding.

Zhang Hao smiled: "Uncle Zheng, this ...... It's not convenient to say for the time being. Thank you for your understanding. ”

Disappointment flashed in everyone's eyes.

Zheng Changqiu smiled and apologized.

I don't want Zhang Hao to continue: "When we discuss it later, the Zhang family will definitely tell everyone as it is." ”

Everyone's eyes lit up suddenly, but then they looked at each other, and they all saw the vigilance in their eyes.

The subconscious meaning of Zhang Hao's words is obvious: Unless my Zhang family becomes a member of the Refining Guild, we won't see rabbits and eagles!

The reason why Zhang Hao and Zhang Shengye did not hesitate to take out the best crossbow bed in the family was to be a stepping stone.

Zheng Changqiu laughed a few times, looked at some large and small complex iron rings next to him and asked, "What is this?"

"This one...... It's a bearing!"

"Bearing?" Zheng Changqiu picked one up and looked at it, and finally his eyes were full of surprise, "It's really a bearing, but the bearing can hardly feel resistance!"

Virtuous nephew, what do you say about this bearing?"

Zhang Hao smiled: "This is our family's craftsmen, who groped it out when they were bored."

In contrast to the rudimentary slip ring bearings, these roller bearings feel almost no significant resistance.

The most important thing is that this kind of bearing replacement is relatively convenient. In case the bearing is damaged, there is no need to overhaul it, just replace it with a new one. ”

Everyone picked up a bearing to observe, and gradually, their faces became serious. Only by careful observation can you find that this small bearing is by no means simple.

Zhang Hao watched with a smile on the side.

Don't underestimate this little component!

Without bearings, there would be no country on wheels, no industrialized machinery with high-speed and stable rotation, and no industrial power.

Bearings are industrial joints!

And in this world, bearings now also have many applications. Vehicles, ballistas, ramparts, ramparts, and more.

If the ballista bed is used by the Zhang family as a stepping stone to enter the Refining Guild, then the bearing is an important commodity that the Zhang family is ready to sell to the Refining Guild. It will also be the fist product of Zhangjia in the future, and it will be sold at home and abroad!

If you want to produce bearings, you can hardly do it without a machine tool. It is not impossible to rely on hand polishing, and it can definitely make craftsmen doubt life.

However, Zhang Hao also understands that don't underestimate the wisdom of this world; simple machine tools are not complicated, and they can't be studied soon.

But before everyone researched the machine tool, it was enough for the Zhang family to make a huge fortune relying on the bearing. At that time, the Zhang family will be able to play the price war and suppress the opponent fiercely!

And now, everyone looks at these precision bearings and is amazed.

Someone finally said, "This bearing technology alone is enough for the Zhang family to become a member of the Refining Guild." ”

Everyone talked about it.

After a long time, Zhang Hao took the initiative to interrupt everyone's discussion, pointed to the third group of items, and introduced loudly: "This is a gift from the Zhang family to the Refining Guild. ”

Everyone looked at the neatly arranged and various items, and they were a little confused. Looking at Zhang Hao's tone, it seems that these are very remarkable things. But how does it look like an ordinary object?

Someone went over and appraised it: "The purity of Xuantie is 62%?Zhang Gongzi, are you sure this is a gift to the Refining Guild?"

Zhang Hao glanced at the other party with disdain, and said loudly: "This gift is called: Standard!"

Zhang Hao looked around and introduced it directly.

"Many people doubt why the Zhang family can produce thousands of tons of dark iron a month! Today, I will tell you one reason, that is, standard!

What is a standard?

Zhang Hao didn't speak, and directly disassembled several identical bearings on the spot, and the base, rollers, cages, and screws rolled to the ground. Then, Zhang Hao picked from them at random and slowly recomposed the bearings.

Gently pushing the bearing in front of everyone, Zhang Hao said quietly: "This is the standard!"

The eyes of the people froze. Sometimes, a thousand words are not as good as one action.

Everyone refining tools and so on, they are all refining their own, and the standard thing is not a single hair. It's too late to keep it secret. Even within some families, the standards of magic weapons and magic weapons are different!

Zheng Changqiu was a pragmatic one, he squatted down, picked up the screwdriver on the ground, and began to disassemble and assemble the bearings. He dismantled it very carefully and carefully observed every part.

With Zheng Changqiu as an example, even Mu Yingying and Mei Qianyun took a look, and then began to disassemble and assemble the bearings.

Let's compare every roller, compare every screw......

Before you know it, it's noon. Zhang Hao clapped his hands, and the chefs of the Zhang family immediately sent a simple lunch.

Everyone ate a few bites casually, and then continued to disassemble and assemble the bearings. By the middle of the afternoon, Mei Qianyun, a fairy, had oil stains on her sleeves.

Then Zhang Hao didn't speak, he asked the guards to lay a piece of paper on the board, he picked up the attack on the table, and began to draw.

"It's called a 'meter ruler'. In order to refine production, we have adopted a smaller and simpler unit than 'zhang and ruler', which we named 'meter' and 'centimeter' in Zhangjia.

The traditional units such as 'zhang and ruler' are more chaotic and larger, which is not conducive to fine production. ”

"It's a compass, and with a compass I can easily draw an infinite number of identical circles. ”

"This is a protractor, and we divide the circumference into 360 scales, each of which is called 'degrees', and each of which is temporarily divided into 60 minutes. ”

"This is the clock, and we divide it into hours, one hour and 60 minutes, one minute and 60 seconds. The standard for dividing the circumference is borrowed from the clock. ”

"This is a thermometer, and we make the ice water meter to zero, and set the temperature of boiling water at sea level to 100 degrees, and divide it into 100 scales. Then rely on this criterion, up or down.

With a thermometer, we can intuitively represent the temperature level. ”

"This is the scale, this is the scale...... We took a new unit: kilograms, a kilogram is a kilogram......"

......

It was a wonderful performance, Zhang Hao kept talking for more than an hour, and finally even proposed a 'combination unit'.

For example: acceleration, pressure, etc.

But for all the combination units, Zhang Hao stopped at the point, but did not say the significance of the combination units. But it also leaves an introduction, a seed.

In the end, Zhang Hao concluded: "Since we want to build the magic of war together, then the standard is very important. Only a unified standard can make the perfect fit between the various magic weapons.

This 'standard' is the congratulatory gift that the Zhang family gave to the Refining Guild!"

The applause rang out in pieces at first, but soon it became louder and uninterrupted like the waves of the sea.

The so-called sword gift to the martyrs, the 'standard' is the 'sword' that these refining guilds need, and its preciousness is far beyond the weight of wealth.

The birth of the standard has made everyone faintly see a different world!

In the applause, Ji Wei of the Jiuyang Sect shouted: "I agree with the Zhang family joining the Refining Guild!"