Wall support for excavations,申请号US19300452106-传众专利搜索

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发明名称	Wall support for excavations
摘要
申请公布号	US1880316(A)	申请公布日期	1932.10.04
申请号	US19300452106	申请日期	1930.05.13
申请人	BEN DANCER	发明人	DANCER BEN
分类号	E02D17/08	主分类号	E02D17/08
代理机构		代理人
主权项
地址

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