FIG.QYH641气动O型调节切断球阀
FIG.Q941电动两片式法..
FIG.SMQ661F 气动..
FIG.931喷煤粉电动球阀
FIG.921电动三通内螺纹..
FIG.Q611F气动三片式..
FIG.QYH641气动O型..