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发明名称
Method and apparatus for sealing crevices in rock formations or the like
摘要
申请公布号
US1858952(A)
申请公布日期
1932.05.17
申请号
US19260127896
申请日期
1926.08.07
申请人
CHRISTIANS GEORGE W
发明人
CHRISTIANS GEORGE W.
分类号
E02D3/12
主分类号
E02D3/12
代理机构
代理人
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地址
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