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发明名称
EXCAVATION TOOL
摘要
申请公布号
US5139099(A)
申请公布日期
1992.08.18
申请号
US19910736725
申请日期
1991.07.26
申请人
MITSUBISHI MATERIALS CORPORATION
发明人
HAYASHI, TAKESHI;SATO, SHIGERU;TSUJIMOTO, KATSUAKI;MIYAZAKI, DAISHIRO;HIWASA, YONEO;ISHIMATSU, TOSHIKI;WADA, KIMIYO
分类号
E21B10/32;E21B10/38;E21B10/62
主分类号
E21B10/32
代理机构
代理人
主权项
地址
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