Underground water Underground water door door price, waterproof door manufacturers, Shandong's coal watertight door flowers and the world, a leaf search. One a sigh, life is one person, one to one, that is Shandong's coal production underground waterproof door, Shandong's coal production underground water gate of the conflict between quality and price when we insist on the quality of our play is Quality war is protracted war, the protracted war in the national market, Shandong's coal production underground waterproof door Why so good, it is because we guarantee the quality, we do not take life as a trifling matter, we reduce the loss for the country, Shandong's coal requirement is people-day Shandong's coal mine machine mine closed doors main parameters Model Specifications - Drawing No. - Weight kg MMB1.4 * 1.8 - B85373 (1) - 1123 MMB1.6 * 1.8- -B85373 (2) - 1194 MMB1.8 * 2.0 - B85373 (3) - 1319 MMB2.0 * 2.1 - B85373 (4) - 1430 Mine waterproof closed doors is a major coal mine security door First, a coal mine play to prevent water suddenly into the general need to install 3 underground door: two-way fence gate, fence dual fire doors, watertight doors closed. Waterproof closed doors which is the most important, play a crucial role in the coal mine. Holy Mountain Machinery Co., Ltd. Shandong coal mine annual production of waterproof airtight doors, fire gates, anti-shock doors Inclined wells blast doors, blast doors refuge chamber, anti-sudden throttle, throttle and other non-pressure mine gate, buffer Bed and buffer strips, concrete sleepers, corrosion sleepers, various mine support equipment with Shandong's coal waiting for your advice. Shandong's coal Xiao Han 24 hours waiting for your Union