法兰三偏心多层次硬密封蝶阀 flange three eccentric multi-level hard seal butterfly valve D343W-10/16/25/40R

法兰三偏心多层次硬密封蝶阀 flange three eccentric multi-level hard seal butterfly valve D343W-10/16/25/40P

对夹三偏心多层次密封蝶阀 wafer three eccentric multi-level hard seal butterfly valve D363

对焊三偏心多层次密封蝶阀 butt welded three eccentric multi-level hard seal butterfly valve D363

法兰球墨铸铁蝶阀 flange SG iron butterfly valve D41X-10Q

蜗轮法兰球墨铸铁蝶阀 worm flange SG iron butterfly valve D341X-10Q

D71 对夹手柄蝶阀

D371 蜗轮对夹式蝶阀