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发明名称
BORRSTRAENG
摘要
申请公布号
FI791927(A)
申请公布日期
1979.12.23
申请号
FI19790001927
申请日期
1979.06.15
申请人
JOY MANUFACTURING CO
发明人
BAILEY EDWARD A
分类号
E21B;E21C;F16B;(IPC1-7):E21B/
主分类号
E21B
代理机构
代理人
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地址
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