China's development of a super high-speed rail system using a low-vacuum tube magnetic levitation (maglev) technology, https://blossom.primal.net/31993094fd2102e6b14a61981a174c55a81838291aaca17c0de1f97f94d6e91f.mp4
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China's low-vacuum https://blossom.primal.net/31993094fd2102e6b14a61981a174c55a81838291aaca17c0de1f97f94d6e91f.mp4 tube magnetic (maglev) development super a rail levitation technology, system a of high-speed using