D971X-10S电动UPVC蝶阀

D971X-10电动对夹软密封蝶阀

DGU971H-10P电动真空蝶阀

D971J-10电动衬胶蝶阀

D941F-16P电动防爆法兰蝶阀

D921F-10P电动丝扣蝶阀

D981F-10P电动卡箍式蝶阀

D971X-10电动防爆软密封对夹蝶阀

D973H/F-16C电动对夹硬密封蝶阀

D941X-10电动法兰软密封蝶阀