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to phrases
enveloping curve
bridg.constr.
包络线
ecol.
包络曲线
包线
oil
包线
space
包络曲线
tech.
包线【电】
;
包络
曲
线
;
包
络曲
线
envelop curve
tech.
包络曲线
enveloping curve:
4 phrases
in 2 subjects
Hydroelectric power stations
2
Technology
2
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