Duct, high-temperature high-pressure cylinder overall molding technology, vertical seamless, flame retardant, antistatic, wind resistance, seamless wind and high strength, for a coal mine, tunnel engineering support for local fan pressure the ventilation. Suction duct seamless tube blank heightened force of the spring steel ring using advanced high-pressure heat sealing process is refined, it has good suction effect, easy turning, convenient transport and storage (each section individually wrapped), longer life etc., for a coal mine ventilation and dust, especially suitable for pumping gas use, but also for tunnel engineering Dust ventilation. Zip-duct, especially for large diameter duct size, it is not easy to have a joint leakage, easy to transport, carry, and easy to use. Shaped duct, duct elbow, head size hairdryer, trigeminal hairdryer, pants duct, high quality PVC material with high elastic spring steel ring refined, especially for multi-port and fans began to air, Dual Parallel powerful air blower with air flexible, multi roadway while air, ease of use. Engineering tunnel duct, fire-retardant duct using high temperature and pressure cylinder overall molding technology, vertical seamless, flame retardant, antistatic, wind resistance, seamless wind and high strength, suitable for coal mine, tunnel supporting the role of local fan project. For more information please contact: Business Contact: Mengyue Fei Contact phone: 18660761686 Business Want: zhongmei0326 business QQ: 2247579936 E-mail: zhongmeixz@163.com Company Address: 69 High-tech Zone, Jining City, Shandong Province torch Road