| 摘要 |
1479977 Teasting for weld flaws BRITISH STEEL CORP 15 Oct 1975 [15 Oct 1974] 44642/74 Heading G1N Apparatus for testing welds in a steel tube 4 includes an assembly 1 comprising a container 10 filled with a liquid e.g. transformer oil and having a passage 21 in its walls for cooling water, within which container is an eddy current coil device having a primary coil 15 flanked by two secondary coils, 16, 17, Fig. 3 (not shown). |
