ONORM E 6546-1998 Electrical installation material - Pliable corrugated insulating conduits made of PVC-U, coated, for medium or heavy mechanical stress, non flame propagating
1998ONORM E 6546-1998 Electrical installation material - Pliable corrugated insulating conduits made of PVC-U, coated, for medium or heavy mechanical stress, non flame propagating