共 7 条
- [1] ARMSTRONG E, 1940, METAL TREATMENT, V6, P153
- [3] EHRHARDT RA, 1947, MONTHLY REV AM ELECT, V34, P421
- [4] Hewitson E. H., 1927, U.S. Patent, Patent No. 1627900
- [5] KELLER F, 1949, 36TH P ANN CONV AM E
- [6] KORPIUM J, 1939, Patent No. 2142564
- [7] MEYER WR, 1946, MONTHLY REV AM ELECT, V33, P269