weld|welded|welding

工人用焊枪把两块金属板焊接在了一起。

The worker used a torch to ___weld the two metal plates together.

工人将两根金属管焊接在一起。

The worker ___welded the two metal pipes together.

焊接工戴着防护面罩进行焊接。

The welder is ___welding with a protective mask.