MANUFACTURING METHOD OF HOLLOW THICK BALL,申请号JP19770028286-传众专利搜索

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发明名称	MANUFACTURING METHOD OF HOLLOW THICK BALL
摘要
申请公布号	JPS53113261(A)	申请公布日期	1978.10.03
申请号	JP19770028286	申请日期	1977.03.15
申请人	TOHOKU STEEL	发明人	HOSHI JIROU;KOSAKA SHIGEAKI
分类号	B21K1/02;B23K9/00	主分类号	B21K1/02
代理机构		代理人
主权项
地址

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