The logistics group does not need a lunar rover, and the two lunar rovers are exactly one in one group and one in each of the three groups. Pen × fun × Pavilion www. ｂｉｑｕｇｅ。 ｉｎｆｏ

Ye Han's group returned to the temporary base, took the cutting tools, took the lunar rover to the ice lake again, found a random place to park, wiped the thin lunar soil and moon dust on the surface, and the ice hidden below exposed a corner, shining with the unique reflection of water ice under the illumination of the headlamp.

Ye Han picked up a portable laser cutting machine and yelled: "It's time to start, stay away!" ”

The reason why the laser cutter is used is because as long as there is no problem with the power supply, this thing can always work, although there is a problem that the beam is not easy to control, but overall the flaws are not hidden.

Ice is different from other substances, the lower the temperature, the higher the hardness of the ice, and the hardness of ice can reach 6 on the Mohs scale at minus 50 degrees.

What is the concept of hardness 6? The hardness of iron is only 4-5, the hardness of stainless steel is 5.5, and the hardness of pure titanium and hacksaw blade is 6!

If you replace it with traditional cutting tools, I am afraid that the ice cubes have not been cut out, and the tools will be scrapped first, even if it is metal products, only low-temperature steel can be used in the extremely low temperature environment of the earth.

Note that it is used in the extremely low temperature environment of the earth, and the extreme low temperature of the earth is about minus seventy or eighty degrees, which is far from being compared with the low temperature on the surface of the moon, unless it is cryogenic steel, it can be used at more than minus 200 degrees.

The problem is that sending any gram of physical goods from the Earth to the Moon costs a huge amount of money, and it is a bit too extravagant to send a bunch of steel just to cut the ice.

There are many similar situations, so there are very few physical tools in the temporary base, and all the problems that can be solved by electricity will be solved by electricity!

The small nuclear reactor at the temporary base can be used for at least 10 or 8 years, and it will always be running even if it does not generate electricity, so all the problems that can be solved by electricity are not a problem, and it is perfect to cut the ice with a laser.

Laser cutters are not fun, if you accidentally touch the spacesuit, you can immediately cut out a hole, the spacesuit loses pressure, and there is no chance to run back.

From this point of view, Ye Han, who operates the cutting machine, is in the most dangerous situation, and the cutting machine in his hand may injure the spacesuit if he is not careful.

Ye Han is the team leader, how can he not rush to the front at this time?

He wanted to cut directly on the flat ice, but after thinking about it, he felt that the plane was not easy to cut, so he looked around and looked around to find something like icicles to cut, but he only found a few things like graves.

The grave bag is the grave bag, it is better than the ice surface, Ye Han rushed over with the cutting machine, and after removing the floating soil on the surface, a very abstract ice lump appeared in front of several people.

Xu Hua leaned on the ice lump and took a look: "Can this work?" There are too many impurities. ”

The glacial lakes on the earth are formed by freezing water, and there are few impurities in the ice layer; The glacial lake on the moon was formed by the impact of an icy asteroid, and the surface of the glacial lake fluctuated in various heights, including peaks and valleys.

There are very few flat places, not to mention that there are many messy impurities mixed in the ice.

Because there are too many impurities, it is not just a matter of finding a random place to cut a few pieces to complete the task, but you must find an ice layer with high ice content and few impurities to get twice the result with half the effort.

The impurity content of the ice lump is not less than 50 percent, and if the ice lake is compared to a vein, this ice lump is the kind of ore that is extremely barren and has little mining value.

Ye Han could only find an ice lump again, this time the quality was much better, but it was an empty shell, only a layer of ice less than two fingers thick was sitting there like a tent, and there was nothing in the shell.

Ye Han didn't fight anywhere, and resigned himself to the original freezing point: "I can figure it out, Lao Gao brought us here, and he must have seen the situation of the ice lake a long time ago." ”

At the freezing point designated by Gaokai, the impurities in the ice layer do not exceed 10%, which is an absolute high-quality mineral source.

Duan Zhiyang replied: "Eighty percent is true, according to my opinion, this crater is a big glacial lake, but there are too few places suitable for mining." ”

"Makes sense!" Ye Han agreed.

When the ship landed, the retro blew open the lunar soil beneath the spacecraft, and he still vividly remembered that the black ground under the lunar soil was very hard, and now that he thought about it, it was probably ice mixed with too many impurities...... It's too tongue-in-cheek to say this, and to put it bluntly, it's just a layer of frozen and hard mud.

Xu Hua said with a smile: "I don't know what the asteroid looked like when it hit here." ”

"What else could it look like." Ye Han said, "First collided, then exploded, and then the water flowed into the pit, after the temperature dropped, the water boiled violently to take away the heat, and finally a little water was left at the bottom of the pit to freeze, and the misfortune has been left to this day." ”

"It's boiling!" Xu Hua looked back into the distance and saw the undulating continuous peaks and ridges of the crater in the distance without hindrance, "What is the diameter of this pit?" ”

"More than thirty, less than forty."

Xu Hua smiled: "You say, this crater is surrounded by mountains, doesn't it look like a cauldron?" ”

"It's kind of like...... What do you want to say? Ye Han felt that there was something in his words.

Xu Hua smiled again: "You said, if you were standing outside the crater and watching at the time of the impact, a cauldron of dozens of kilometers was full of churning boiling water, how spectacular!" ”

"I'll rub it, you can figure it out!" Ye Han wrote a big word in his heart, "Why do you have such a brain?" ”

Xu Hua smiled embarrassedly: "Just think about it."

Duan Zhiyang stretched out his thumb: "You cow!" The spacesuit's gloves only had two fingers, and he couldn't make more complex gestures than a thumbs up.

"Gotta gotcha, don't you have to talk nonsense, start work!" Ye Han put the cutter on the ice under his feet and waved at his two companions.

Duan Zhiyang and Xu Hua hurriedly retreated.

Ye Han didn't dare to be careless, in order to avoid the beam being reflected by the ice surface, he didn't dare to cut vertically, and put the cutter obliquely over to make sure that the beam could not shine on him even if it was reflected, so he started the switch of the cutter.

A beam of light that is invisible to the naked eye shoots out from the top of the cutting machine, and the beam only appears after it touches the ice surface, and the ice irradiated by the beam quickly heats up and melts, and then vaporizes and scatters, and after a while, Ye Han cuts a thin and deep ice crack.

Ye Han quietly breathed a sigh of relief, changed the direction and continued to cut, and it didn't take long for several ice cracks to form an irregular quadrilateral shape on the ice surface, each cutting crack was bottomless.

It's not that the cut is unfathomable, it's that the light is too poor to see how deep the cut is.

Ye Han manipulated the cutting machine to cut diagonally twice, and finally cut off an irregular triangular column-shaped piece of water ice from the ice surface.