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SJM electric group co., ltd. is located in jinxiang county, shandong province, China. Founded in 1967, it is a designated enterprise of the former ministry of mechanical industry.The only manufacturer in Asia that has passed the Italian CESI test (iec 60076-11). The world's only manufacturer of 110kV class extra-large resin cast dry type power transformers. The factory covers an area of 54000 square meters, and the main product is resin cast dry type transformer, with an annual production capacity of 10 million kva.Kingmanke focuses on technological progress and excellent customer service. The technology development center can provide design and installation for the customer's power grid protection, and the technical service personnel can respond to the customer's technical support within 24 hours.