CERAMICS EDGE POINT MATERIAL FOR DRILLING ROCK BED,申请号JP19900182180-传众专利搜索

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发明名称	CERAMICS EDGE POINT MATERIAL FOR DRILLING ROCK BED
摘要
申请公布号	JPH0470493(A)	申请公布日期	1992.03.05
申请号	JP19900182180	申请日期	1990.07.10
申请人	AGENCY OF IND SCIENCE & TECHNOL	发明人	KARASAWA HIROKAZU;MISAWA SHIGEO
分类号	E21B10/46	主分类号	E21B10/46
代理机构		代理人
主权项
地址

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