H42/44/62/塑料立式旋启式单由令立双由令立止回阀

H12/H42黄铜/螺纹/法兰/衬氟立式止回阀

H14/44/74/76黄铜螺纹螺纹超薄双瓣旋启式止回阀

H11/41/61/71升降衬氟铜法兰焊接卫生对夹止回阀