BK23D-10 ,BK23D-12 , BK23D-15 ,BK23D-20 ,BK23D-25 ,三通防爆型電磁閥 BK23D-10 ,BK23D-12 , BK23D-15 ,BK23D-20 ,BK23D-25 無錫市昌林自動(dòng)化科技有限公司