Способ отливки корпусов бурильных долог,申请号SU19490391477-传众专利搜索

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发明名称	Способ отливки корпусов бурильных долог
摘要
申请公布号	SU86002(A1)	申请公布日期	1949.11.30
申请号	SU19490391477	申请日期	1949.02.04
申请人	SHTEJNBERG B.M.	发明人	SHTEJNBERG B.M.
分类号	B22C9/08;B22D27/13	主分类号	B22C9/08
代理机构		代理人
主权项
地址

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