Waterproof closed doors prices, MMB waterproof closed doors, mine closed doors we use carefully, carefully, carefully, to build there is quality waterproof closed doors, with the quality, service forever your Heart! Features Waterproof closed doors of a simple operation, easy to grasp the ambulance crew, available high-pressure nitrogen gas-filled bottles can also be used manually inflatable tiger skin; 2, light weight, easy to carry; to solve the traditional enclosed material transport difficulties, time-consuming and labor issues; 3, the construction speed, generally only 5-7 minutes, the fastest just four minutes to complete the temporary closure; 4, good sealing effect, leakage rate, balloon air tightness can be maintained without revealing more than 24h ; 5, wide application, can be used in different sections of shapes, different forms of roadway bracket, versatile, very flexible; mine waterproof door conventional models and weight: 1, MMB1.4 * 1.8 ???? 1123kg 2, MMB1.6 * 1.8 ???? 1194kg 3, MMB1.8 * 2.0 ???? 1319kg 4, MMB2.1 * 2.0 ???? 1430kg Mountain Machinery Co., Ltd. Shandong coal mine holy to welcome you to your power!