SOUND DAMPENING OF HYDRAULIC OR PNEUMATIC DRILLS,申请号ZA19810008952-传众专利搜索

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发明名称	SOUND DAMPENING OF HYDRAULIC OR PNEUMATIC DRILLS
摘要
申请公布号	ZA8108952(B)	申请公布日期	1982.11.24
申请号	ZA19810008952	申请日期	1981.12.28
申请人	BOART INTERNATIONAL LTD	发明人	RICHARDS E
分类号	E21B;E21C	主分类号	E21B
代理机构		代理人
主权项
地址

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