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541 One day on the moon (3)

Ye Han immediately asked: "When will the earth send raw materials?"

Gao Kai, who had already put on his spacesuit, took off his helmet and held it in his hands: "All the equipment that needs to be sent is in place. Unless there are special circumstances in the future, we will not send raw materials and equipment to the moon again. We have to solve it ourselves. Therefore, there is no absolute

It’s best not to touch the printer unless necessary.”

Ye Han sighed helplessly: "I understand."

He didn't know exactly how much equipment there was on the moon, or what kind of equipment there was, but there were at least hundreds of unopened spaceships in the temporary base. There must have been a lot of equipment, and there were even necessary backups.

Gao Kai fastened his helmet and walked towards the airlock: "Hurry up!" After saying that, he got into the airlock, and the door was closed tightly behind him. There was a hissing sound of air extraction, and the air extraction equipment quickly evacuated the air in the airlock until the representative

The green traffic light came on, and Gao Kai opened the outer gate and stepped onto the moon.

The airlock from the living cabin to the outside world allows only one person to pass through at a time. The entire group must be divided into dozens of times before they can all leave the living cabin.

It's not impossible to leave at once, but the prerequisite is that everyone puts on their spacesuits and evacuates all the air in the locker room.

In this case, the control system of the living cabin allows the two-layer gates to be opened at the same time. In this way, everyone in the locker room can leave one at a time.

Speaking of which, we have to talk about the structure of the living cabin. The living cabin is not a cabin with a simple structure. Its internal design is very complicated. The internal space is cut into pieces by large and small rooms, and all the doors have gas holes.

The airtight structure can be regarded as a single-layer airtight door.

This design can retain the air pressure in each small space to the maximum extent in the event of pressure loss.

Moreover, designers have even considered the opening direction of the airtight door. Wherever astronauts are likely to stay for a long time, the door must open inward.

In this way, once the indoor and outdoor pressure is lost, the indoor air pressure will tightly press the door against the door frame to prevent the loss of indoor air; conversely, if the indoor pressure is lost and a negative pressure environment is formed, the airtight door will be relatively high outside.

The air pressure is pushed open, which not only supplements the pressure, but also acts as a reminder.

Of course, under normal circumstances, most environmental monitoring devices can detect pressure fluctuations in advance and promptly remind astronauts to pay attention to pressure failures. However, it is better to be afraid of the worst case scenario. Such a design can prevent the adverse consequences caused by equipment failure to the greatest extent. It can be said that

It is the last line of safety defense for the living cabin.

There are many similar designs, for example, everyone lives in two living cabins, also for safety reasons; the dressing room between the two living cabins can serve as an escape shelter in the event of a rupture of the living cabin, etc.

Everyone left the living module one after another. Gao Kai and another astronaut had already driven out two lunar rovers from a nearby garage.

Gao Kai waved and said: "Everyone, get in the car and go see the construction site first, and then we'll group up for action!"

Everyone is carrying weights on their bodies. They cannot jump around like when the United States landed on the moon, but climb on the lunar rover like they did on Earth.

The structure of the lunar rover is very simple, just an alloy chassis, a few wheels and a simple control system.

This thing is directly powered by electricity, so it can run for dozens of kilometers without any problems. It is the main means of transportation for astronauts on the moon.

Ye Han noticed that the wheels of the lunar rover had a hollow structure in the center, similar to the hydrangeas used in the lion dance, and immediately realized that these were the legendary carbon fiber wheels.

There is no sunlight all year round in the polar craters, and the surface temperature is much lower than on a moonlit night, and the lowest can even reach more than 200 degrees below zero.

Although the lunar surface lacks a thermal convection medium and the temperature of the object will not be lost for no reason, the wheels must be in contact with the ground, so the materials used must be resistant to low temperatures.

The environment in space is harsh, and aerospace materials must not only withstand low temperatures, but also must withstand high temperatures. There are not many materials that meet the requirements. There is really no member of the rubber family that is suitable for use on the lunar surface.

Many people believe that one of the evidences that the American moon landing is a hoax is that the Yankees' moon rover actually used pneumatic rubber tires, and the company that produces such wheels has never launched such super wheels on the market. Even the Yankees have

This kind of wheel was only used during the moon landing. After the moon landing, all the lunar rovers and Mars rovers manufactured by the Americans used alloy metal wheels.

If the rumors were true, everyone would doubt whether the Yankees' moon landing mission was true. After all, they had deceived Mao Zi with the Star Wars project and were habitual criminals with a criminal record.

The lunar rovers looked simple, but their performance was not bad at all. The two lunar rovers left the temporary camp one after the other, drove westward for more than 300 meters, and stopped at the bottom of a continuous cliff.

That's right, it's a cliff.

The high crater is almost vertical to the ground, the cliffs are uneven, and large chunks of broken rock can be seen everywhere.

Gao Kai pointed to the cliff not far away and drew an arch in the sky: "The base gate opens right here."

Ye Han walked to the bottom of the cliff, and his headlight illuminated the black rocks. He couldn't help but said, "It would be fun if we found fossils here."

"Then you are awesome." Gao Kai said.

The origin of the moon is still a mystery. If fossils can be found on the moon, it will prove the moon's origin.

"Don't be joking, everyone should remember this place well," Gao Kai said.

After a while, Gao Kai called everyone onto the lunar rover and ran to the ice lake in the south to remind everyone of these two most important positions. Then the groups officially separated.

The excavation team began to lay cables leading to the cliff. Once the cables are laid, the base will be officially excavated.

The logistics team returned to the temporary base and entered the biological experimental cabin to serve the vegetable seedlings cultivated without soil. The biological experimental cabin has two functions. One is to observe the growth of earth plants on the moon, and the other is to provide fresh vegetables for astronauts, so everyone cares about it.

The experimental cabin is called Caiyuanzi.

According to the plan on the ground, when the base expands and there is enough space in the future, a batch of poultry such as laying hens will be sent over to enrich the astronauts' diet.

There is no shortage of eggs in the aerospace diet, but they are all finished products such as braised eggs and boiled eggs. Fresh eggs cannot withstand the huge pressure when the rocket takes off.

Not only poultry, the long-term plan for the ground is to even send all kinds of domestic animals to the moon. After all, giant insects are raging on the earth today. Even if wild animals are not extinct, they are on the verge of extinction. Except for humans, they are human beings.

The largest population of poultry and livestock is raised.

Even if humans completely eliminate giant insects in the future, it is impossible for the earth's biosphere to return to the state before the insect disaster. It is said that one of the most important tasks of biological experiments in various countries is to collect and preserve the embryos and DNA of wild animals for future restoration of wild animal populations.

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