2005: Qualification test of welding operators 焊接操作工技能评定 2005: Specification and qualification of welding procedures for metallic materials-General rules 焊接工艺规程及评定的一般...
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check of welding operation qualification中文是什么意思 ... qualification test of welding operators 标准:焊接操作工技能评定 qualification welding operator 合格自动焊工 welding performance qualification test 焊接性能评定试验 ...
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