Shaanxi to the Electrical and Mechanical Services Ltd. is a research and development, production, sales, as one of the High-Tech technology enterprises, and companies leading products HN series of rapid and monitor coal car, the train sampling series. Fast coal sampling and monitoring device for supporting the use of sampling tests carried out simultaneously train services completely ruled out human factors. The item was identified as encouraging the development of the state&＃39;s key industries, enterprises rapidly expanding, and achieved extraordinary results of operations, and was unanimously praised by users, and create a good economic and social benefits.