专利名称：Liquid level detection
发明人：Fryer, Clayton Dale,Stie, Kenneth Earl,Wedel, Michael William,Stamper, Kenneth Royce
申请号：EP90119402.7
申请日：19901010
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鸡血藤公开号：EP0424729A3脚背上的经络图
孕妇激情公开日：煮汤
19920226
专利内容由知识产权出版社提供
电动吹风机摘要：A method and apparatus for detecting the prence of a liquid level at a monitor point along the depth of a borehole utilizes a diaphragm pressure switch for nsing the pressure of a captive air column in a measurement tube extending from the pressure switch to a predetermined point below the monitor point. In u, a rising liquid level in the borehole als off the open lower end of the measurement tube from the earth atmosphere and allows the rising liquid level to compress the captive air column. In a preferred embodiment a visual signal is activated by the pressure switch when the rising liquid level in the borehole reaches the monitor point.
马氏庄园申请人：PHILLIPS PETROLEUM COMPANY
地址：5th and Keeler Bartlesville Oklahoma 74004 US
国籍：US
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代理机构：Geissler, Bernhard, Dr.jur., Dipl.-Phys.
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