Holding other license such as mechanical work, welding, pressure vessel, etc is preferred.

持有别的证书如机械、电焊、压力容器证书是优先的。

youdao

Base Knowledge For Material Quality, Visual Welding Quality, NDT, Etc.

了解产品的质量，焊接和无损检测知识。

youdao

Base Knowledge For Material Quality, Visual Welding Quality, NDT, Etc.

了解产品的质量，焊接和无损检测知识。

youdao