D943H电动伸缩蝶阀D943H

GID,GIQ气动，电动高真空蝶阀GID,GIQ

D343W通风蝶阀D343W

D643W气动通风蝶阀D643W

SD343H伸缩蝶阀SD343H

WBSX信号蝶阀WBSX

D343H弹性硬密封法兰蝶阀D343H

D343H三偏心多层次法兰蝶阀D343H

D341X软密封法兰蝶阀D341X

D373H弹性硬密封对夹蝶阀D373H

D373H三偏心多层次对夹蝶阀D373H

D371X软密封对夹蝶阀D371X