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发明名称
CONSTRUCTION OF SHAFT
摘要
申请公布号
JPH0821180(A)
申请公布日期
1996.01.23
申请号
JP19940154053
申请日期
1994.07.06
申请人
NIPPON KOMUSHISU KK;NIPPON TELEGR & TELEPH CORP <NTT>;KYOWA EXEO CORP
发明人
NISHIMUTA HIROSHI;MORIJIRI WATARU;IWASA MASAMI;SUZUKI SHUICHI;YAGI HAJIME;KUJIRAI TAKAO;WATANABE SUSUMU;ITAGAKI KOJI;ABE TOSHIO
分类号
E21B7/20;E21D5/04;(IPC1-7):E21D5/04
主分类号
E21B7/20
代理机构
代理人
主权项
地址
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