Hsieh Yu butterfly valve is designed for installation with square screw, nut and washer.
Hsieh Yu butterfly valve is designed for installation with square screw, nut and washer.
协羽的蝶阀安装设计是使用方形螺丝，螺母及华司所组成。
Hsieh Yu butterfly valve is designed for installation with square screw, nut and washer.
协羽的蝶阀安装设计是使用方形螺丝，螺母及华司所组成。