Correct

搭焊

/ dā hàn / 
Strokes

Example

As a Noun

joint welding

1
Dā
搭
hànjī
焊机

lap (seam) welder

2
Dā
搭
hàn
焊
guǎntǒng
管筒

lap welded tube

3
Dā
搭
hànguǎn
焊管

lap welded pipe