DIN EN 1971-2-2012 铜和铜合金.在无缝圆铜和铜合金管上的测量缺陷的涡流试验.第2部分:在内表面使用内部探针的试验.德文版本EN 1971-2-2011
Copper and copper alloys - Eddy current test for measuring defects on seamless round copper and copper alloy tubes - Part 2: Test with an internal probe on the inner surface; German version EN 1971-2:2011