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flight readiness firing
gen. 试飞前点火试验
avia. 火箭飞行前点火试验; 发动机飞行前检査起动; 飞行前点火试验
space 火箭飞行前点火试验,发动机飞行前检查启动
flight readiness firing: 3 phrases in 1 subject
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