But Christopher didn't dare to let this senator out, a senator with a certain amount of heat was not something he could provoke.

His resentment did not last long, however, and soon a group of men in civilian clothes entered the factory, and as soon as they met, they put out the tags hidden in their collars.

“F-B-I！ Please cooperate with us! ”

They went straight to the FAA senators, who were yelling, and without listening to any explanation, they put each other up and walked out.

Christopher and the engineers in the factory watched all this in amazement, until a figure who resembled a leader walked up to him, glanced casually at the councillor who had been ejected, and then gently patted Christopher on the shoulder and said:

"You're doing the greatest work in the world, and no one can stop that."

"Yes, yes, ......"

"That guy? He'll soon be overwhelmed by sex scandals and divorce lawsuits, and rest assured that Endeavour's makeover plan will be watched by the president every day. ”

The FBI left as quickly as it came, and Christopher was stunned for a moment before directing the dismantling of the nuclear engine to continue, but he was more confident in the final success.

Of course, the A105 has strong pollution when it is launched in the atmosphere, but the residual pollution other than this is not very large, and as long as the take-off and landing area of the space shuttle is strictly limited, the harm is much lower than expected.

However, the president's high level of attention surprised him, so much so that he had a much better impression of the little old man, and even flipped up John's Twitter account in his spare time.

Suddenly, a new Twitter message popped up:

John: In astronomy, the solar system is divided into two regions by the asteroid belt, and we call the part outside of it deep space.

Far from the sun, all the worlds are cold and lonely, just like the universe, and to walk towards them is to get rid of the boundaries of the cradle and truly move towards the universe.

Teaser: On January 20, at the University of Pennsylvania, let's fly to the stars together. ”

……

"Mr. Zhu Bingguang, please check whether your helmet lock is pulled down, check whether the power connection of the wrist monitor is normal, and check the ......"

Zhu Bingguang stood in the airlock cabin of the Jiuzhang, checking item by item according to the intelligent voice in the headset, and his assistant and Fu Xiangjie were also doing the same thing.

It's now January 18, and the Tianmu-3 mission has reached its third landing, with the last three payload experts consisting of the 3D printing lunar soil team and the nuclear expert Rosen.

The remaining six experts and three others are stationed on the "Wutu" space station, and will also return to the Tiangong space station in the next 10 days, and then go down to the ground.

By January 26, all nine payload specialists will be withdrawn to Earth, and the main mission of Tianmu-3 will come to an end.

But for the four career astronauts, they are less than halfway through their work.

The two professional astronauts who came down this time were Liu Ming and Fu Xiangjie, and this was their first mission to the moon.

By February 2, the second refueling spacecraft and two permanent habitation modules will be launched into lunar orbit, and they will need to be refueled and then properly located by February 15 to become the moon's first long-term habitation base.

Although there are only two sections, it can provide 150 square meters of living space, which can accommodate up to 10 people, and it is quite comfortable to station 4 astronauts.

Artemis III's record of more than 8 days will be easily broken, and even a month will not be a problem.

Therefore, Fu Xiangjie did not regard the time spent on the moon as precious, which was completely different from Zhu Bingguang.

"Where is it, where is Lao Yang's test field!"

As soon as he got off the spaceship, he didn't even have time to pack up his 3D printed prototype of lunar soil, so he clamored to see the results of his opponent first.

Yang Xinjun's first landing mission also lasted almost four days, and he used a small number of samples prepared on the ground to lay a test site, and the list of landing missions also included checking whether the performance of the space cement had changed significantly after 15 days.

First of all, the surface environment of the moon is impossible to mix cement, water and sand in the open air like the earth, and then it is the extreme environment of more than 100 degrees at the highest level and more than 200 degrees below zero on the surface of the moon.

Space cement needs to be used in the range of -15 degrees to 75 degrees Celsius at the lunar surface temperature to ensure fluidity, and uses hydrocarbon organic matter fluid instead of water as a cementing agent, which has fluidity at low temperature and will not evaporate at high temperature, otherwise it will either immediately condense into ice crystals or evaporate when exposed to air.

The rest of the mixing, laying and other processes also need to be completed with special machinery, and Yang Xinjun only paved an area of five square meters with all his might.

Fu Xiangjie first looked at Lawson and plugged in the white ...... The tricolor then took them to the test field, and the 3D printing test area had to be placed there anyway to play a contrasting role.

When the lunar rover drove to its destination according to the navigation, he did not see the flat land he imagined.

On the other hand, although the test field is generally flat, the surface is densely packed into palm-sized pieces like fish scales, giving people the feeling of ......

"It's flat with your feet, isn't it?"

Zhu Bingguang commented unceremoniously, and at the same time squatted down and pinched the bulge on the ground hard.

The color of the space cement after use seems to be no different from the lunar soil itself, but when it is solidified, it does achieve the same effect as concrete, at least with his manpower, it is not possible to cause a little damage.

"This ...... Is it really pedaling with your feet? ”

"No, I'm just kidding, don't take it seriously."

Zhu Bingguang interrupted his assistant's words, but explained seriously:

"If you don't think about it well, think about it, if the temperature difference between day and night of the moon is a few hundred degrees, how long can it withstand the tensile life of thermal expansion and cold contraction?

PPT is to flatten the ground in order to show technical strength, can but does not mean to do this, and the gravity of the moon is very low, in order to prevent high-speed vehicles from skidding in the future, the formation of lines can also increase friction, this old thing is really thoughtful enough, and it is only a little worse than me. ”

Fu Xiangjie listened to the previous words and kept nodding his head and secretly sighed that Professor Zhu was broad-minded, but the last sentence immediately reversed all the good impressions.

"But this stress relief method is completely uneven, and the paving is fine, and it can be ...... when building Hehe.

So he can only lay a flat plot here, and we're going to build one here...... A wall! ”

Thinking of Zhu Bingguang, who had limited raw materials this time, he changed his words in time, but it still did not affect his complacent mentality.

Only Rosen, who followed silently, although he didn't say a word, secretly despised it in his heart.

He already knew that United Mining was interested in building roads with nuclear bombs, or more accurately in the Great Plains, and that the benefits would far outweigh the cumbersome and inefficient ways of doing so.

Who would have known that the hydrogen bomb, created for the purpose of mass destruction, really had such great potential for engineering applications?

(End of chapter)