Nitrocarburizing
气体碳氮共渗; 渗碳氮化
🗣️ 情景例句
I hope you have a wonderful time
希望你们玩得开心
I learned geography last week.
我上星期学地理。
That's it. Thank you for your help. Goodby.
对的。谢谢你的帮忙，再见。