Waterproof closed doors closed doors manufacturer of underground water, a variety of customized water-tight door one day your name will appear in my account of this family! Someday Shandong's coal production of water-tight door appeared in various coal mines across the country. The main part of the water-tight door are: frames, embedded parts, the door, the tensioning device. Wherein the frame is a channel, beam composition; channel embedded part is made of water-tight door embedded parts can be soldered directly to the door frame can also be made with bolted body composition, can be ordered Roadway actual purchase; the body is a combination of door panels and boards from well; tensioning device is composed by the screw and wedge slide. Model waterproof closed doors is MMB, size waterproof closed doors are the national standard can also be customized, the national standard has MMB1.4 * 1.8, MMB1.5 * 1.8, MMB1.6 * 1.8, MMB1.8 * 2.0, the national standard model as an example to MMB1.4 * 1.8, 1.4 * 1.8 is the maximum size of a door frame and can not contain embedded parts, so customers must be selected at time of order size. Shandong's coal mines Machinery Co., Ltd. is a coal mine mine gate designated manufacturers, there is the China Coal Industry Association awarded the designated manufacturers certificate, but also inspection reports issued by relevant departments, at the time of shipment, we will examine the report and certificate Bring together. Shandong's coal not already, do just fine! We do not need to talk to the other house price war, CEOs see no need, we also see no need, it is always shining gold! Shandong's coal mine led to believe that most of the primary or improving quality! Quality! Quality ~! 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 Tel: 0537-3879059, Mobile: 18369707066, QQ : 2900685502 Address: Jining City, Shandong Province Yanzhou Yan Zhen Industrial Park