1)closed centered implement valve,自动回位闭心机具阀2)closed centered control valve,自动回位闭心控制阀3)closed centered position,自动回位闭心位置4)automatic return water switch valve,回水自动启闭阀5)self-closing gate valve,自动关闭阀6)automatic circumference valve,自动回流阀
用法和例句
The design and lectotype of circulating pump, automatic return water switch valve, expansion tank and atmospheric connection pipe in atmospheric hot water heating boiler room are discussed.
