A process for the production of vacuum-proof, impermeable work pieces,申请号GB19390008973-传众专利搜索

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发明名称	A process for the production of vacuum-proof, impermeable work pieces
摘要
申请公布号	GB509753(A)	申请公布日期	1939.07.20
申请号	GB19390008973	申请日期	1939.03.21
申请人	DEUTSCHE GOLD- UND SILBER-SCHEIDEANSTALT	发明人
分类号	C22F1/16	主分类号	C22F1/16
代理机构		代理人
主权项
地址

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