Sealed dowel bar and shielded bearing,申请号US19460681375-传众专利搜索

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发明名称	Sealed dowel bar and shielded bearing
摘要
申请公布号	US2531040(A)	申请公布日期	1950.11.21
申请号	US19460681375	申请日期	1946.07.03
申请人	HELTZEL JOHN N	发明人	HELTZEL JOHN N.
分类号	E01C11/14	主分类号	E01C11/14
代理机构		代理人
主权项
地址

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