The animation of the notebook appears again, this time the animation is first the production machine, then an arrow pointing to 100 coins, and then the mecha, pointing to 1 coin, meaning that the production machine is worth 100 coins, and the mecha is only worth 1 coin, which is 99 coins.

The whip star hurriedly used a 3D projection to return the price, indicating that the mecha was worth 20 coins.

Looking at the two people who were bargaining with animated images, Lin Ziyu was happy, took out his mobile phone to record the video, and while recording, he thought to himself, will his notebook become a cultural relic to witness major historical events? After all, this is the first extraterrestrial contact and communication tool.

The two of them bargained fiercely, and finally ended the bargain with a mecha worth 30 coins, the reason why the price would be higher than the whip starman's initial counteroffer was entirely because the whip star scratched Lin Chenxi's itch, and when he learned that Lin Chenxi planned to give this mecha to his future sister as a toy, the whip starman slapped and smiled and came up with a series of transformation plans, and attached a series of cool equipment modules, uh, it is a toy that is not lethal at all, and attached a dress up package, that is, clothes, capes, wigs, combs and the like。

Don't look at these things in the eyes of ordinary adults, they have no substance at all, but in the eyes of the little girl, this thing is very lethal, and even Lin Chenxi was moved. Think about it, what it would be like to give your sister a one-of-a-kind doll that could be dressed up and driven around?

Lin Ziyu saw that the two of them had finished bargaining, so he came over with his mobile phone, and the camera circled around the notebook, taking pictures of some unique features of his notebook.

Lin Chenxi was curious: "Dad, what are you doing?"

Lin Ziyu used the camera to magnify a scratch and said: "Photograph features, this is the first tool for extraterrestrial contact and communication, and it will be the heirloom of our old Lin family in the future, if you don't photograph its unique features, how can you prove its identity?"

Lin Chenxi: "......"

After Lin Ziyu finished shooting, he put away his mobile phone and said, "Is it really okay for this mecha to stay at home?

"Dad has forgotten my ability? My ability is to be heart-to-heart, to know if others are lying, and to ask when the time comes, whether they have done anything will be clear naturally. ”

"Well, I forgot you still have this superpower. "The presence of the girl's superpower is really not strong, I have only used it once, it is to calm my mother's heartbeat, but in this special situation, it is really easy to use.

"But in order to prevent this guy from making a ghost, we still have to show off our strength properly, show off our muscles, well, and make a big machine by the way, so that we can process our luxury bus." ”

Lin Ziyu heard that he was going to make a big machine, and his eyes suddenly lit up: "Xixi, what are you going to make, a 3D printer?" Lin Ziyu has seen a 3D printer on the Internet, this thing is very magical, you can do anything, if you have this machine, how good it is, you can make a figure if you have nothing to do, a toy or something.

Lin Chenxi shook his head and said, "No, I'm going to make a hydraulic press." ”

"The hydraulic press looks bulky just by the name, and the 3D printer is so good that it can print anything. Lin Ziyu still misses 3D printers.

Lin Chenxi corrected his father's erroneous view: "3D printers are not as divine as they say on the Internet, and they can't do everything, such as the key load-bearing parts of airplanes." ”

"No, I read it on the Internet, and now 3D printing can print the large frame of the body of the J20, which is the large frame that fixes the engine. Lin Ziyu took his laptop, searched the Internet, searched the news, and pointed it out to his daughter.

"There's no reason why it's impossible to print such a critical part with today's technology. Lin Chenxi's head was full of question marks, and after leaning in front of the screen to take a look, he almost burst into laughter.

"Poof, Dad, that's fake news. Lin Chenxi smiled and pointed to the picture and said: "Dad, you see, this part has traces of milling cutter processing, and this situation will occur, either it is processed by the machining center, or after it is printed, the surface finish is not up to standard, and then it is finished with a milling cutter." The second is basically impossible, since it is to show 3D printing technology, it should be displayed locally, what does it mean to finish it once?

Lin Ziyu looked at the other pictures of the news and found that there were really no traces of refinement.

Lin Chenxi continued to point to the five people holding the parts and said: "Dad, look at it again, the five people in the back are workers at first glance, such a major achievement, there are no leaders and R&D personnel to show their faces, and you look at their expressions, like overcoming major difficulties?"

Lin Ziyu took a closer look, and really found that something was wrong, except for the second one on the right who laughed very obscenely, the other four people didn't laugh at all, and there were three people who looked impatient.

Lin Chenxi continued to point to the picture below and said, "If you compare the three people below, those three people look proud. ”

Lin Ziyu took a look, and the person holding the parts below had a really proud expression. Seeing this, Lin Ziyu still didn't understand that his feelings were fooled by the news, and it is estimated that he was still fooled by the war.

However, Lin Ziyu still didn't give up and said: "The one below is true, although it is not a large frame of the fuselage, but this part is also quite large." ”

"3D printing, and the traditional process has its own advantages and disadvantages, not as said on the Internet, in the complex structure, the performance requirements of the parts, it has advantages, but the performance requirements of the parts, or by the forging press to make. To put it bluntly, the current metal 3D printing is only powder surfacing welding, and there are still many difficulties to overcome to achieve high performance. ”

Seeing his father's face of loss, Lin Chenxi hurriedly changed the topic and said: "Dad, I am going to make a million-ton forging press, which is a heavy weapon in the national heavy industry." ”

"Zhenguo Heavy Weapon?" Lin Ziyu's loss was gone, and the word sounded very powerful.

"That's right, the 10,000-ton forging press is a heavy weapon in the country, the top metal processing field, it is inseparable from this big guy, human beings have made a total of more than 100 aircraft carriers so far, and the 10,000-ton forging press has been made less than 50 units, it is rarer than aircraft carriers!"

After the girl said this, Lin Ziyu suddenly became interested, it is rarer than aircraft carriers, many countries don't have one, how cool will it be if they have one?" "Xixi, it sounds like this thing is so difficult to build, can it really be made?"

"It's hard for other people, and for me, it's much easier than building our bus. "The principle of the 10,000-ton forging press is not complicated, and the difficulty of manufacturing lies in the large parts and high processing accuracy. The large beams are hundreds of tons, and even the nuts are five or six tons, and it is a problem for these things to turn over, let alone process and install. But for Lin Chenxi, processing and installation are trivial.