Underground water underground mine closed doors closed doors, pump house waterproof closed doors, closed doors price 'live for twenty years, not for the motherland and the people do something, every thought of this, heartbroken. But the choice of e-commerce industry is my twenty years for the motherland and the people do the most right, I sold mine gate, to do that for the safety of the mine, Shandong's coal mining machine in mining machinery equipment for decades, has extensive production experience, advanced technology is the preferred manufacturer of mining equipment. Mine water-tight door GB size four: MMB1.4 * 1.8, MMB1.6 * 1.8, MMB1.8 * 2.0, MMB2.1 * 2.0, can also be customized according to the actual size of the roadway. Model National plotting No. Jingkuan m clear height m weight t MMB1.4 * 1.8 B85-373 (1) 1.5 1.8 1.1 MMB1.6 * 1.8 B85-373 (2) 1.7 1.8 1.2 MMB1.8 * 2.0 B85-373 (3 ) 1.9 2.0 1.3 MMB2.1 * 2.0 B85-373 (4) 2.2 2.0 1.4 Mining waterproof door closed doors welded steel plate, wherein the back of a number of vertical and horizontal wells to strengthen the board, to ensure that the strength of the door body, mine Waterproof closed doors partially embedded in the roadway with concrete pouring of the wall there, you want to make real-time installation. Mine waterproof closed doors open and flexible, we produce water-tight door has two bearings, when the need to completely shut down all six tensioning device to be used for the bolts. 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