Qualification licensing a... ... Examination and administrative rules for welders specializing in boilers and pressure vessels and pressure pipes锅炉压力容器压力管道焊工考试与管理规则 Steam boiler safety technology supervisory regulations蒸汽锅炉安全技术监察规范 Supervision regulation on safety technology for pressure vessel压力容器安全技术监测规程 ...
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