Bail-type anchor device for a hollow rock bolt,申请号US19650466946-传众专利搜索

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发明名称	Bail-type anchor device for a hollow rock bolt
摘要
申请公布号	US3324756(A)	申请公布日期	1967.06.13
申请号	US19650466946	申请日期	1965.06.25
申请人	WILLIAMS CHESTER I	发明人	WILLIAMS CHESTER I.
分类号	E21D21/00	主分类号	E21D21/00
代理机构		代理人
主权项
地址

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