Prf
n. pulse-repetition frequency的简 写
🗣️ 情景例句
What I do with my money is none of your business.
我怎么花钱跟你无关。
Please keep the cartons to 15kg each and metal-strap all cartons in stacks of 4.
请将每个纸箱重量限制在15公斤内，并将每4箱一组用铁条儿固定起来。
It's used for cutting.
用于切割。