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发明名称
Improvements in or relating to devices for shoring or spragging
摘要
申请公布号
GB518084(A)
申请公布日期
1940.02.16
申请号
GB19380023959
申请日期
1938.08.15
申请人
WALTER SYLVESTER
发明人
分类号
E21D11/22
主分类号
E21D11/22
代理机构
代理人
主权项
地址
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