單膜片低阻力倒流防止器 微阻緩閉止回閥HH44X H41H升降式止回閥 HC44X橡膠瓣止回閥 H71H不銹鋼對(duì)夾式止回閥 H44H旋啟式止回閥 不銹鋼衛(wèi)生級(jí)快裝止回閥 H71不銹鋼對(duì)夾式止回閥 H74F46襯氟對(duì)夾止回閥 H42H立式法蘭止回閥 HH44X微阻緩閉止回閥 H44X型橡膠瓣止回閥 HH46型微阻緩閉蝶式止回閥 H44T旋啟式法蘭止回閥 H44美標(biāo)旋啟式止回閥 不銹鋼臥式止回閥H14W H76對(duì)夾雙瓣旋啟式止回閥 H71對(duì)夾升降式止回閥 H77型對(duì)夾式止回閥 H74W對(duì)夾單板圓片式止回閥 H41X節(jié)能消聲止回閥 H11H/H61H鍛鋼止回閥 CVWR對(duì)夾式*止回閥 HQ44微阻球形止回閥 HQ45微阻球形止回閥 HH49型微阻緩閉蝶式止回閥 南瓜型消聲止回閥H71X 不銹鋼*止回閥NRVB HC41X消聲剛體止回閥 CVKR型大口徑*式止回閥 CVKR*止回閥 HC41X-16鋼體消聲止回閥 HH46X微阻緩閉蝶式止回閥 HH49X微阻緩閉蝶式止回閥 H41H鍛鋼止回閥 A105鍛鋼止回閥H61H H7B41X液控止回閥 LHS712X低阻力倒流防止器 LHS743X低阻力倒流防止器 消聲止回閥HC41X 蝶式抽汽止回閥 CKH743H抽汽止回閥 H76W對(duì)夾雙瓣旋啟式止回閥 H74W對(duì)夾單瓣旋啟式止回閥 H71W對(duì)夾單瓣旋啟式止回閥 HQ41X滑道滾球式止回閥 HQ45X微阻球型止回閥 HQ44X微阻球型止回閥 HC44X（SFCV）膠瓣止回閥 H77X對(duì)夾蝶形止回閥 不銹鋼消聲止回閥HC41W HC41X/T消聲止回閥 H42X（DRVZ）*止回閥 DXH44H蝶式斜置密封多功能止回閥 H47H蝶式緩沖止回閥 HH49X微阻緩閉蝶形止回閥 KH44Z微阻緩閉止回閥