上海沪工美科不锈钢止回阀耐腐蚀耐酸碱

H44X-16Q上海京蝶橡胶瓣止回阀法兰逆止阀

HC44X良工阀门京蝶阀门橡胶瓣法兰软密封止回阀

HC41X良工阀门京蝶阀门节能消声法兰软密封止回阀

HQ44X良工阀门京蝶阀门微阻球形法兰软密封止回阀

HH44X良工阀门沪工阀门微阻缓闭法兰软密封止回阀

HH49X良工阀门京蝶阀门微阻缓闭蝶形法兰止回阀

H47X良工阀门京蝶阀门蝶式缓冲法兰软密封止回阀

DHH44X/H良工阀门京蝶阀门微阻缓闭消声法兰止回阀

H44T良工阀门京蝶阀门铸铁法兰硬密封止回阀

H40Y良工阀门沪工阀门高压法兰硬密封止回阀

H41F46/H44F46良工阀门京蝶阀门衬氟法兰软密封止回阀