Base e.g. for heat exchanger, has several throughholes with edge and reference plane of base is provided and in sealing contact with base

摘要

The base has several throughholes (6) with an edge (7). A reference plane (8) of the base is provided and in a sealing contact with the base. The amount by which the edge (7) on the reference plane (8) varies over the course of the rim (7). An independent claim is included for a heat exchanger.