The vent pipe is made of black encrypted plastic rubber bone wrapped with encrypted thick steel wire as the skeleton, and the pipe
body is made of special high-quality flame-retardant fireproof PVC sandwich net cloth. The independent thick tail ring is located
at the pipe body. There is a metal ring every one meter. The duct can be easily fixed. Widely used in computer rooms, basements,
tunnels, municipal pipeline engineering, underground cable maintenance, mechanical shipbuilding engineering, fire rescue, airports,
breeding, dapeng planting fields, mines and other working environments, cold and warm air transport circulation, ventilation, etc. , It
is a supporting product for portable exhaust fan.