Pipefitting
un. 管子配件；管配件；管道链接\\n
🗣️ 情景例句
Are you here on business or for pleasure?
你来这儿是出差还是游玩？
I know the boy whose father is a professor.
我知道那个男孩的父亲是大学教授。
I would like to ask you a favor.
我可以提出一个要求吗？