1. Wuhan Dongyongan Metal Material Recycling Co., Ltd., whose main business is electrical appliance recycling, is located at Xujiatai 1 No.,Xin 'andu Office, Dongxihu District, Wuhan (15);
2. Ceng Ming second-hand furniture, whose main business is furniture recycling, counter air conditioning, refrigeration equipment and other electrical appliances recycling, is located at 7 1 Tangcai Road, Jianghan District, Wuhan. Ac frequency cabinet is a kind of frequency converter, which is used to control and adjust the output frequency of frequency converter, thus changing the speed of motor.