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to phrases
active length
auto.
作用长度
el.
活性段长度【核】
eng.geol.
有效长度
tech.
活动时间
;
有效长
(度)
;
工作长度
active length
:
20 phrases
in 5 subjects
Drilling
2
Electric machinery
11
Electronics
4
Metallurgy
2
Technology
1
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