butterfly valve
31u series butterfly valve 2 – 20″, 285 psi
电液动蝶阀electrichydraulicbutterflyvalve
pvc 一体式蝶阀杠杆型 - buy butterfly valve,one-piece,lever
图片内容是:butterflyvalve
pvc 一体式蝶阀杠杆型 - buy butterfly valve,one-piece,lever
geevalve格阀化工氯化聚氯乙烯cpvc对夹气动蝶阀 butterfly valve
重型304不锈钢快装蝶阀卡箍式 tri-clamp butterfly valve
气动操控式制动用于气体
化工氯化聚氯乙烯cpvc电动法兰对夹蝶阀electric butterfly valve