cyanide case hardening

• 氰化

cyanide case hardening的用法和样例：

例句

1. Cyanide is used to kill insects.
   氰化物可用来杀害虫。
2. Zinc base die castings are always copper plated in cyanide baths.
   锌基合金的压铸件总是在氰化镀液中镀铜。