短語詞組短語welder performance qualification 焊工操作資格;焊工考試welder operation qualification test 焊工上崗資格認定Welder performance qualification test 焊工技術(shù)鑒定試驗Code for welder technical qualification 焊工技術(shù)考核規(guī)程welder qualification test 焊工考試;焊工測驗;焊工資格考試;焊工資格考核check of welder qualification 焊工評定的檢查welder qualification certification 焊工合格證base metal for welder qualification 焊工評定用母材base metals for welder qualification 焊工評定用母材 返回 welder qualification