... of AOJ series industrial plugs, sockets , couplers and so on .Certification : CE , CCC , ISO:9001, GBQuality with certificate CE, comply with ... ,IEC-60309-2 , and it also has passed CE Certification , CCC Certification , ROHS Certification , and CB Test , and their quality has been accepted ... well as old and new customers . plug ,industrial electric plug , weatherproof plug