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被动段 bèidòngduàn
avia. unpowered-flight phase
space non-powered phase; passive phase; unpowered flight phase; unpowered phase
弹道被动段 bèidòngduàn
space inactive leg
被动段: 15 phrases in 7 subjects
Air defense1
Astronautics1
Aviation1
General1
Space9
Sports1
Technology1