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FR2581093A1
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MARKING OF A FABRIC PIECE, DEVICE FOR CARRYING OUT THIS METHOD AND LABEL OBTAINED
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US4006635A
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Liquid level measuring process and indicator
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FR2251240A5
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Density measuring system for pipeline flow - uses transducer responsive to pressure difference of two probes releasing air
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GB1271695A
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Apparatus for measuring the level of liquid in a reservoir
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ES366518A3
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Improvements in level telemedition devices. (Machine-translation by Google Translate, not legally binding)
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FR94384E
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Improvements to level measuring devices.
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US3403557A
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System for measuring the level of a liquid or pulverulent solid
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