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
Good morning, sir.
早安，先生。
Will you come with me to the doctor's office?
你能跟我一道去看医生吗？
There is a call for you.
有你的电话。