油回火 meaning in English
oil drawing
oil tempering
Examples
- Oil tempered carbon steel spring wire and springs
油回火碳素钢弹簧钢丝和弹簧 - Oil tempered carbon steel valve , spring quality wire , and springs
油回火碳素钢阀弹簧钢丝和弹簧 - Oil tempered wire for mechanical springs
机械弹簧用油回火金属丝 - Oil tempered wire for valve springs
阀门弹簧用油回火金属丝 - Oil tempered chromium - vanadium valve spring quality wire and springs
油回火铬-钒汽门弹簧优质钢丝和弹簧