tandem sequence submerged arc welding

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1.	纵列多丝埋弧焊在线英... ... 纵向缝： longitudinal joint 纵列多丝埋弧焊： tandem sequence submerged arc welding 总延伸： overall elongatio… dictall.com
2.	双丝自动埋弧焊 ... ) tandem sequence submerged arc welding 双丝自动埋弧焊 ) two wire series power sub-merged arc welding 串联双丝埋弧 … www.dictall.com

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