Backstep welding
[化] 分段退焊
🧩 词语组成解析
后退
a. 焊的\\n[机] 熔接, 焊接, 锻接
🗣️ 情景例句
Please take your places.
请大家就座。
A penny saved is a penny gained.
省一文是一文。
There are some in the cupboard.
碗橱里有几只。