... overview of the - CM, CMW, the CME, the CMD busbar type wall bushingHigh-voltage wall bushings: hereinafter referred to as the ... of the product, according to GB/T5582 divided into I, II, III, IV, 4;Recurrent severe vibration Second, product characteristicsCasing by the ... casing technical conditions. CM, CMW, the CME, the CMD busbar type wall bushing (high-voltage wall bushing)