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发明名称
A wedge for use in connections for girders for supporting mine roofs
摘要
申请公布号
GB762667(A)
申请公布日期
1956.12.05
申请号
GB19530022370
申请日期
1953.08.13
申请人
ALOYS VANWERSCH
发明人
分类号
B60B15/26;E21D17/086;H01H13/36
主分类号
B60B15/26
代理机构
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