Number | Date | Country | Kind |
---|---|---|---|
55-107969 | Aug 1980 | JPX |
Number | Name | Date | Kind |
---|---|---|---|
2232638 | Schwalbe | Feb 1941 | |
3554505 | Dessarts | Dec 1981 | |
4214869 | Thekdi et al. | Jul 1980 |
Entry |
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Transactions of the Iron and Steel Institute of Japan, vol. 17, No. 5, 1977. |