UNHEATED FUEL-LINE ASSEMBLY AND METHOD OF DETECTING LEAKAGE AT AND/OR IN A FUEL LINE

摘要

The present invention relates to an unheated fuel line assembly to be used for a car and provides an inner tube for the pipe line and an external tube covering the inner tube with a space (a) from the inner tube. On the inner side of the external tube facing toward the inner tube are multiple grooves formed extending from at least the part of the external tube in vertical direction.