Lowfinned tube
[化] 螺纹管
🧩 词语组成解析
🗣️ 情景例句
and cheese sandwiches for lunch.
和起士三明治当午餐。
In all things, it is better to hope than to despair.
凡事抱希望为佳，不应悲观而失望。
The machines will not operate properly.
那些机器不能正常运转。