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When this kind of joint is welded to make a process, what should welder choose for the project with certificate
When this kind of joint is welded to make a process, what should welder choose for the project with certificate
wangliang
这种接头焊接做工艺的时候,焊工持证项目应该选什么呀?是按C类选还是D类呀?
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2019-11-01
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是董小姐呀
C类
2019-11-01 09:27:53
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是董小姐呀
C类