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发明名称
摘要
申请公布号
DE2701066(C2)
申请公布日期
1984.12.13
申请号
DE19772701066
申请日期
1977.01.12
申请人
KABUSHIKI KAISHA KOMATSU SEISAKUSHO, TOKIO/TOKYO, JP
发明人
HOASHI, KENZO;TAKADA, HIROSHI, YOKOHAMA, KANAGAWA, JP
分类号
E21B4/16;E21B4/18;E21B7/04;E21B7/06;E21B7/08;E21B7/20;E21B7/26;E21B7/28;E21D9/08;(IPC1-7):F16L1/02
主分类号
E21B4/16
代理机构
代理人
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地址
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