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on-board system | read
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gen. ; ; ; 读物
footb. 预见; 预料
geophys.
golf. 查看球洞区
oil 读出

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On-Board System
abbr., astronaut., mil. OBS
on-board system read
: 77 phrases in 9 subjects
Air defense1
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Aviation28
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Space25
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United States1