,申请号JP20060540285-传众专利搜索

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发明名称
摘要	The invention relates to a drill bit containing tungsten carbide powder having powder particles which have a core of cast tungsten carbide and a shell of tungsten monocarbide.
申请公布号	JP4773362(B2)	申请公布日期	2011.09.14
申请号	JP20060540285	申请日期	2004.11.16
申请人		发明人
分类号	C01B31/34;B23B27/14;B23B51/00;C04B35/56;C04B35/628;E21B10/56	主分类号	C01B31/34
代理机构		代理人
主权项
地址

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