Related work license.

相关操作许可证。

youdao

Engaged in related work for more than 2 years, with the relevant license.

从事相关工作2年以上，有水处理证。

youdao

Engaged in related work for more than 2 years, with the relevant license.

从事相关工作2年以上，有水处理证。

youdao