March 24 morning, a batch of mining waterproof airtight doors were loading in the intelligent equipment workshop of Shandong China Coal Group and would be sent to an iron mine in Tangshan, Hebei.
Waterproof airtight door is mainly used for the underground main substation and the main pumping station and drainage channels leading to the shaft bottom, to prevent underground sudden leakage and immersion. The mining waterproof airtight door, independently developed and produced by the Group, was modified on the basis of original products. And with the advantages of fast close, rugged, good sealing, easy to use, the the new type waterproof airtight door, since put into the market, was widely praised by domestic and foreign customers. At present, this kind product has passed MA, and each safety standards are in full compliance with state regulations.

Over the years, China Coal Group always adhere to the business philosophy, " Seek development by service, Strives for the survival by the quality",produced and seld high quality product, kept the product market share ahead in the same industry. In the future, China Coal will continue to offer the customers all over the world the best quality products and the most complete services to make a well-known world brnad. Welcome new and old customers at home and abroad visit China Coal Group for procurement!