Ясс многогранного сечения,申请号SU19300067459-传众专利搜索

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发明名称	Ясс многогранного сечения
摘要
申请公布号	SU35764(A1)	申请公布日期	1934.04.30
申请号	SU19300067459	申请日期	1930.04.01
申请人	BEREZOVSKIJ N.E.;KOGAN A.YU.	发明人	BEREZOVSKIJ N.E.;KOGAN A.YU.
分类号	E21B3/00;E21B19/08	主分类号	E21B3/00
代理机构		代理人
主权项
地址

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