申请人 |
HITACHI CONSTRUCTION MACHINERY CO., LTD., TOKIO/TOKYO, JP |
发明人 |
WATANABE, HIROSHI, USHIKU-SHI, IBARAKI 300-12, JP;TANAKA, YASUO, TSUKUBA-SHI, IBARAKI 305, JP;IZUMI, EIKI, NIIHARI-GUN, IBARAKI 315, JP;ONOUE, HIROSHI, NIIHARI-GUN, IBARAKI 315, JP;NAKAMURA, SHIGETAKA, TSUCHIURA-SHI, IBARAKI 300, JP |