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to phrases
arc time
el. 电弧持续时间
met. 燃弧时间
tech. 拉弧时间; 弧焊开动时间; 弧光发生时间; 发弧时间; 发弧〔拉弧，燃弧，弧光发生〕时间; 电弧作用时间
arc time: 6 phrases in 4 subjects
Electronics3
Metallurgy1
Technology1
Welding1

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