申请人 |
HITACHI, LTD., TOKIO/TOKYO, JP;HITACHI POWDERED METALS CO., LTD., MATSUDO, CHIBA, JP |
发明人 |
KAMITSUMA, YASUO, MITO-SHI, IBARAKI 311-41, JP;NAKAGAWA, YUSAKU, HITACHI-SHI, IBARAKI 319-14, JP;KOBAYASHI, YOSIHIRO, HITACHI-SHI, IBARAKI 316, JP;NAKASHIMA, SHOICHI, HITACHI-SHI, IBARAKI 316, JP;IIZUKA, TADASHI, ASHIKAGA-SHI, TOCHIGI 326-03, JP;NAKAMURA, KEIICHI, TOKYO 174, JP;SHIKATA, HIDEO, MATSUDO-SHI, CHIBA 270, JP |