不锈钢气动蝶阀DN40-250对夹软密封型适用水蒸汽油双向角式蝶阀

气动对夹式不锈钢软密封硅胶蝶阀,D671X

Stainless steel pneumatic butterfly valve DN40-250 double clamp soft seal type suitable for steam gasoline bi-directional angle butterfly valve