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发明名称
摘要
申请公布号
JPH0119034(B2)
申请公布日期
1989.04.10
申请号
JP19820070493
申请日期
1982.04.28
申请人
DAIWA KONKURIITO KOGYO KK;INOE EIICHI;SATO TAKEHIKO
发明人
INOE EIICHI;SATO TAKEHIKO
分类号
E21B7/00;E21B7/20;E21B10/32
主分类号
E21B7/00
代理机构
代理人
主权项
地址
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