METODO PARA FABRICAR TUBO DE PLASTICO ONDULADO Y PERFORADO Y APARATO PARA SU REALIZACION.

摘要

A method for manufacturing corrugated plastic tube by subjecting an internally unsupported corrugated plastic tube, at a temperature between 30 DEG and 70 DEG C, to the simultaneous action of at least two punching members in one or in two corrugations.