... ,Export to Southeast Asia, Europe, Africa 4,PE/PVC 5,CE PE/PVC single wall corrugated pipe production lineSingle wall corrugated pipe extrusion ... the corrugation even.Such as Electrice wire, electric cable threading tube Drain pipe for washing machine cleaner vent-pipe .The pre ... -stress concrete special tube etc,the corrugated pipe,used for automobile ,with 4-6 ...