Harveyizing
哈尔维法钢硬化, 哈尔维法渗碳硬化
🗣️ 情景例句
What's your opinion about this?
你的观点是什么？
I couldn't help it.
我没有办法。
Here are the two originals of the contract we prepared.
这是我们准备好的两份合同正本。