Improved method for attaining a difference in pressure between two chambers filled with gas, and an improved gas-pump for use in connection therewith,申请号GB19320020393-传众专利搜索

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发明名称	Improved method for attaining a difference in pressure between two chambers filled with gas, and an improved gas-pump for use in connection therewith
摘要
申请公布号	GB403461(A)	申请公布日期	1933.12.28
申请号	GB19320020393	申请日期	1932.07.19
申请人	SVEN SIGURD EKMAN	发明人
分类号		主分类号
代理机构		代理人
主权项
地址

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