GDQ-J10(b)/KF,GDQ-J16(b)/KF,GDQ-J25(b)/KF,GDQ-J40(b)/KF,气动高真空挡板阀(带波纹管密封) GDQ-J10(b)/KF,GDQ-J16(b)/KF,GDQ-J25(b)/KF,GDQ-J40( 无锡油研流体科技有限公司