A double -sined Corrugated Pipe Allows You to Maintain Absolute Water Resistance for the Cable, and Also Provides Protection for it From Various External Conditions. Such Negative Conditions for the Cable Can BE Ultraviolet Radiation, Machanical Influences or Chemicals. With the Help of this Method of Bilateral Corrugation, Itsomes Possible to Lay Varius Cables Both Outside and Underground.