CK-J1R,CK-J1N,CK-J1P,CK-J2R,CK-J2N,CK-J2P,CK-J3R,CK-J3N,磁性开关 CK-J1R,CK-J1N,CK-J1P,CK-J2R,CK-J2N,CK-J2P,CK-J3R,C 无锡市昌林自动化科技有限公司