TEMPERATURE-REGULATED SEALED BEARING SYSTEM FOR ROCK DRILL BITS,申请号ZA19760001946-传众专利搜索

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发明名称	TEMPERATURE-REGULATED SEALED BEARING SYSTEM FOR ROCK DRILL BITS
摘要
申请公布号	ZA7601946(B)	申请公布日期	1977.03.30
申请号	ZA19760001946	申请日期	1976.03.31
申请人	SMITH INTERNATIONAL INC	发明人	RICKS R;ROBINSON W
分类号	E21C	主分类号	E21C
代理机构		代理人
主权项
地址

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