Condition indicator for low-water alarms,申请号US19270227759-传众专利搜索

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发明名称	Condition indicator for low-water alarms
摘要
申请公布号	US1793869(A)	申请公布日期	1931.02.24
申请号	US19270227759	申请日期	1927.10.21
申请人	ROBY FRANK M	发明人	ROBY FRANK M.
分类号	F22B37/42	主分类号	F22B37/42
代理机构		代理人
主权项
地址

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