Marcomizing
不锈钢表面氮化处理
🗣️ 情景例句
He has had various experiences in his life.
他的生活经验丰富。
What would you have done last night if you hadn't had to study?
如果昨晚你不必学习你会做什么？
In this shop you can buy school things.
你可以在这个商店里买到学习用品。