浙江快达ZSJZ型水流指示器(螺纹连接式) ZSJZ Water-flowing indicator (Screw thread-linked-type) 规格：DN50，DN65，DN80，DN100 浙江快达ZSJZ型水流指示器(螺纹连接式) ZSJZ Water-flowing indicator (Screw thread-linked-type) 规格：DN50，DN65，DN80，DN100 浙江快达ZSJZ型水流指示器(螺纹连接式) ZSJZ Water-flowing indicator (Screw thread-linked-type) 规格：DN50，DN65，DN80，DN100