Ridges
n. 带钢单向皱纹
🗣️ 情景例句
What kind of dresses would you design?
你打算设计哪种服装？
If I can't go with you, what will you say?
如果我不能和你一起去，你怎么说？
Oxygen is widely used in ship repairs for cutting and joining metal plates or pipes.
在船舶修理过程中，常常使用氧气切割和焊接金属板或金属管。