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发明名称
UNDERGROUND TIMBERING
摘要
申请公布号
JPH01312200(A)
申请公布日期
1989.12.15
申请号
JP19890033509
申请日期
1989.02.13
申请人
SENTAI JIERUJI
发明人
SENTAI JIERUJI
分类号
E21D19/00;E21D23/00
主分类号
E21D19/00
代理机构
代理人
主权项
地址
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