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发明名称
DEFORMABLE ROCK BOLTS
摘要
申请公布号
GB8715614(D0)
申请公布日期
1987.08.12
申请号
GB19870015614
申请日期
1987.07.02
申请人
COAL INDUSTRY (PATENTS) LTD
发明人
分类号
E21D20/02;E21D21/00
主分类号
E21D20/02
代理机构
代理人
主权项
地址
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