Corrugated Pipes are Ussed in Almost All Countries of the World, Such Pipes Are Recognized as the Most Environontal to Date, As Well as The Same Time CHEAPE. In Russia, Corrugated Pipes have Found Their Application Since a Very Recent Time, But the Havy Already QUITE COMMON, and Their QULITIES WEACHETEDDE APPRECIETED BY MANYANE RUSIAN S.