XH41X鸭嘴止回阀
XH41X橡胶鸭嘴止回阀
XH41X柔性止回阀
XH41X鸭嘴式止回阀
XH41X鸭嘴式橡胶止回阀
XH41X鸭嘴型橡胶止回阀
XH41X法兰式鸭嘴阀
LH45X铸钢限流止回阀
LH45X限流止回阀
静音式止回阀(DRVZ、HC42X)
静音止回阀(DRVZ、HC42X、HC41X)
HC41X节能梭式止回阀