A butterfly valve is generally 40% the cost of an iron gate. Not only low initial cost but low installation costs also.
A butterfly valve is generally 40% the cost of an iron gate. Not only low initial cost but low installation costs also.
一个蝶阀的成本通常只有铸铁闸阀的40%，不但购买成本低，而且安装成本也比较低。