Cylinder and piston type coal breaker,申请号US19460694780-传众专利搜索

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发明名称	Cylinder and piston type coal breaker
摘要
申请公布号	US2634114(A)	申请公布日期	1953.04.07
申请号	US19460694780	申请日期	1946.09.04
申请人	JOY MANUFACTURING COMPANY	发明人	JOY JOSEPH F.
分类号	E21C37/08	主分类号	E21C37/08
代理机构		代理人
主权项
地址

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