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emergency message
 emergency message
tech. 紧急呼救信号
| handling
 handling
gen. 操作
hydroel.st. 处理; 维护; 操纵; 控制
interntl.trade. 装卸

to phrases
emergency message
tech. 紧急呼救信号
emergency message
: 22 phrases in 7 subjects
Air defense4
Aviation2
Communications3
Electronics5
Information technology1
Space4
Technology3