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发明名称
KUTSUSAKUKOGU
摘要
申请公布号
JPH04265391(A)
申请公布日期
1992.09.21
申请号
JP19910045891
申请日期
1991.02.18
申请人
MITSUBISHI MATERIALS CORP
发明人
HIWASA YONEO;HAYASHI TAKESHI
分类号
E21B10/36;E21B4/06;E21B10/32;(IPC1-7):E21B10/32
主分类号
E21B10/36
代理机构
代理人
主权项
地址
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