H71W/H-16C/25P-DN25/DN50浙江上海对夹升降式铜碳钢不锈钢止回阀,
H76W-16P止回阀薄型304不锈钢水管对夹式逆止单向阀蝶式铸钢DN50,
304不锈钢对夹双瓣式止回阀H77X-16P 对夹蝶型软密封止回阀单向阀,