多丝埋弧焊multiple wire submerged arc welding 纵列多丝埋弧焊Tandem sequence (submerged-arc welding) 横列多丝埋弧焊series submerged arc welding (SAW-S) ..
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tandem sequence submerged arc welding
... tandem selection 中继选择，转接选择 tandem sequence submerged arc welding 纵列多丝埋弧焊 tandem switch 汇接中继机键 ...
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