Welder's teaching; Sensitive faculty understanding; The Hang solid foundation; Expand way of thinking.

焊工教学；感性认识；夯实基础；开拓思路。

youdao

Welder's teaching; Sensitive faculty understanding; The Hang solid foundation; Expand way of thinking.

焊工教学；感性认识；夯实基础；开拓思路。

youdao