焊工必须按国家有关规定经专门的安全作业培训，掌握焊割安全技术，取得特种作业资格证书后，方可上岗操作。

Welders should be trained according to prescribe by the state authority, and mastering proper techniques of welding, only with special type of certificates then can be allowed to work formally.

youdao

焊工必须按国家有关规定经专门的安全作业培训，掌握焊割安全技术，取得特种作业资格证书后，方可上岗操作。

Welders should be trained according to prescribe by the state authority, and mastering proper techniques of welding, only with special type of certificates then can be allowed to work formally.

youdao