Plastic hose  is  usually divided into two kinds:

  One is to  be completely airtight, watertight, for example, used to deliver the rocket propellant delivery, gas, water heater;

  Another one  is to use belt material continuous winding, common winding corrugated hose used for protection of cable, such as the magnetic card phone set, machine tool, and desk lamp of corrugated pipe is in the process of production sandwich steel wire.