June 4th in the afternoon, Shandong China Coal Group in the production of a batch of waterproof sealing doors formally loading, will be sen to one mine in Yunnan Qujing.
It is reported that the waterproof sealing doors is independet research and production by Shandong China Coal Machinery Factory, and the product has passed the certification of MA. Waterproof sealing doors are mainly used for underground main substation and the main pumping station and drainage channels leading to the shaft bottom, to prevent underground sudden leakage immersion. Our waterproof sealing doors are easily to close in a short time. The products of Shandong China Coal have been unanimously approved by domestic and foreign customers for its durable, good sealing, easy to use and many other advantages.

Over the years, China Coal always uphold the business philosophy that "Strives for survival by quality , Seek development by service", and China Coal products have never had any quality problems, receiving the praise of customers in the industry. At the same time, the market share in the same profession with great competitive advantage. China Coal products have been completely covering the whole country 34 provinces and autonomous regions, and we have established a strategic relationship with a number of large coal mines. Being national mining machinery industry leader!