At this time, the shadow of "Tang" appeared in Zhang Beihai's mind. The shape of Natural Selection is completely different from that of the aircraft carrier at sea two centuries ago. The former disc-shaped main hull and cylindrical engine form two completely separate parts. When the "Tang" died, Zhang Beihai seemed to have lost a spiritual home, although he had never lived in that home. Now, the giant spaceship has given him the feeling of home again. On the magnificent hull of the "Natural Selection", his mind, which has been wandering for two centuries, has found a home. Like a child, he has thrown himself into the arms of some great force. "Natural Selection" is the flagship of the third sub-fleet of the Asian Fleet, which is second to none in terms of tonnage and performance. It has the latest generation of non-propellant fusion propulsion system, which can accelerate to 15% of the speed of light at full power. Its in-ship ecological circulation system is perfect and can last for a long time. In fact, the experimental model of this ecosystem began its trial operation on the moon 75 years ago, and so far there have been no major failures or defects. Natural Selection's weapon system is also the most powerful in the fleet, with its four-in-one weapon system consisting of gamma ray lasers, electromagnetic kinetic energy cannons, high-energy particle beams and interstellar torpedoes, capable of destroying the surface of an Earth-sized planet alone. Now, "Natural Selection" has occupied the whole field of vision, and only part of it can be seen from the transport boat. Zhang Beihai saw that the outer wall of the spacecraft was as smooth as a mirror, perfectly reflecting Jupiter's atmospheric ocean. From this vast mirror, he could also see the image of the approaching transport boat. An oval entrance appeared on the outer wall of the spacecraft. The traffic boat flew straight in and quickly slowed down and stopped. The chief of staff opened the cabin door and took the lead out of the boat. Zhang Beihai was a little nervous because he realized that the boat had not passed through the transition cabin,347 stainless steel, but he immediately felt the fresh air pouring in from outside the door. The air-pressure chamber opens directly into space, but it can avoid the leakage of air in the cabin, a technology he did not know yet. Zhang Beihai and his chief of staff are in a huge sphere, the largest diameter of which is the size of a football field. This spherical structure is commonly used in the cabin of spacecraft. When the spacecraft accelerates, decelerates and turns, any part of the sphere may become a deck or ceiling. In weightlessness, the center of the sphere is the main space for personnel activities. In the era that Zhang Beihai came from, the space cabin still imitated the earth's architectural structure, so he was not adapted to this new space cabin structure. The chief of staff told him that this was the hangar of the fighter planes on the spacecraft, but there was no star fighter plane here now. In the space in the center of the sphere, there was a phalanx of 2, 316ti stainless steel ,x52 line pipe,000 officers and men of Natural Selection. As early as before Zhang Beihai hibernated, the space forces of various countries began to conduct formation drills in weightlessness in space, and formulated corresponding norms and codes. However, it is very difficult to implement. Outside the cabin, the crew can only move with the help of micro-jet thrusters on the spacesuit. Inside the cabin, there is no propulsion equipment. They can only move and position by pushing the bulkhead and paddling the air. In this case, it is difficult to form a neat queue. Now, Zhang Beihai was surprised to see more than two thousand people arranged in such a neat suspension array in the unsupported space. Now, people move around the weightless cabin mainly with the help of a magnetic belt, which is made of superconductors and has a circular current inside. The magnetic field generated by the belt can interact with the ubiquitous magnetic field in the cabin and corridor of the spacecraft. Through a small controller held in the hand, they can move freely inside the spacecraft. Zhang Beihai himself now wears such a belt, but to master it, he still needs to learn skills. Zhang Beihai looked at the space soldiers in the phalanx. They are all a generation growing up in the fleet, tall and slender, without the strength and clumsiness of people growing up under the gravity of the earth, but full of the lightness and agility of the space race. There were three officers in front of the phalanx, and Zhang Beihai's eyes finally fell on the beautiful young woman in the middle, with four stars shining on her shoulders, who should be the captain of the "Natural Selection". She is a typical representative of the new human beings in space. She is much taller than the tall Zhang Beihai. She moves lightly from the front of the phalanx. Her tall and slim figure is like an elegant note floating in space. When she stopped in front of Zhang Beihai and the chief of staff, her hair, which had been floating behind her, was beating elastically around her white neck. Her eyes were full of clear sunshine and vitality. Zhang Beihai immediately trusted her, because the steel seal clan could not have such eyes. This is Dongfang Yanxu, captain of the ship Natural Selection. She saluted Zhang Beihai and said, with a nifty challenge in her eyes, "On behalf of all the officers and men of the ship, I give a gift to my predecessors." She stretched out her hands forward, and Zhang Beihai saw the thing she was holding. Although the shape had changed a lot, he could still recognize it as a pistol. "If I really found out that I had defeatist ideas and escape attempts, my predecessors could kill me with it." It's easy to get to the ground. The trunk of each giant tree is a pillar supporting the underground city dome. From the trunk, you can take an elevator to the ground. In the meantime, it has to pass through more than 300 meters of strata. When Luo Ji and Shi Qiang stepped out of the elevator, there was a nostalgic feeling. The reason for this feeling was that there were no activated display windows on the walls and floors of the exit hall, and all kinds of information were displayed on the real display screen hanging from the ceiling. It looks like the old subway station. There are not many people here, and most of the people's clothes are not shiny. As they walked out of the sealed door of the hall, a hot wind blew on their faces,316 stainless steel plate, with the smell of dust. That's my son! Shouted Dashi, pointing to a man who was running up the steps. Luo Ji could only see from a distance that the man was in his forties, and he was a little surprised that Dashi was so sure. Shi Qiang walked quickly down the steps to meet the man. Luo Ji did not watch their father and son reunite. His attention was focused on the ground world in front of him. lksteelpipe.com