1.8 * 2.0 waterproof closed doors give me a trust, I also carry a high value waterproof closed doors. Shandong's coal mines Coal Mine Machinery Co., Ltd. is a designated water-tight door manufacturer, has China Coal Industry Association awarded the designated manufacturers certificate, there are water-tight door inspection reports issued by relevant departments, we will shipped 1.8 * 2.0 Waterproof closed doors inspection reports and certification to bring together. Waterproof model is the size of MMB closed doors plus door, whose Chinese model is the subject of MMB1.8 * 2.0, the size of the door means that the door clear width and the net, this is sure to pay attention to our customers in the national standard models Case in MMB1.8 * 2.0, 1.8 * 2.0 is the maximum size of the door and can not contain embedded parts, so customers must be selected at time of order size. Mine water-tight door partially embedded in the roadway with concrete pouring inside the wall, the installation must fight reality. Underground water door open and flexible, we produce water-tight door with two bearings need to completely shut down when six tensioning device to be used for all the bolts. I believe the strength of manufacturers, the product will prove everything!