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发明名称
EXCAVATION TOOL
摘要
申请公布号
KR950012431(B1)
申请公布日期
1995.10.17
申请号
KR19910003311
申请日期
1991.02.28
申请人
MITSUBISHI MATERIALS CORP.
发明人
TAKESHI, HAYASHI;SHIGERU, SATO;KATSUAKI, TSUJIMOTO;TAISHIRO, MIYAZAKI;YONEO, HIWASA;TOSHIKI, ISHIMATSU
分类号
E21B10/32;E21B10/56;E21B10/66;(IPC1-7):E21B10/36
主分类号
E21B10/32
代理机构
代理人
主权项
地址
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