申请人 |
HITACHI, LTD., TOKIO/TOKYO, JP;HITACHI POWDERED METALS CO., LTD., MATSUDO, CHIBA, JP |
发明人 |
KAMITSUMA, YASUO, MITO-SHI, JP;NAKAGAWA, YUSAKU, HITACHI-SHI, JP;CHIGASAKI, MITSUO, HITACHI-SHI, JP;IIZUKA, TADASHI, ASHIKAGA-SHI, JP;INABA, KOOICHI, SHIMOTSUGA-GUN, TOCHIGI-KEN, JP;NAKAMURA, KEIICHI, ITABASHI-KU, TOKYO, JP;MINABE, MASAKI, MATSUDO-SHI, JP;KAGAYA, TSUYOSHI, MATSUDO-SHI, JP |