The specific gravity, or relative density, of a substance is the ratio of the density to that of a standard substance, usually water at 4 °C. The relative density of a liquid can be determined by ...
Kernco Instruments Co Inc's Model 11J16 battery/antifreeze tester is a handheld refractometer designed to indicate specific gravity, freezing point temperature, Kernco Instruments Co Inc's Model 11J16 ...
Kernco Instruments Co Inc's Model 1016 battery/antifreeze tester is a hand-held refractometer designed to indicate specific gravity, freezing point temperature, Kernco Instruments Co Inc's Model 1016 ...
Scientists at the Centers for Disease Control and Prevention (CDC) have adapted a simple low-tech device normally used to examine urine specimens to test and detect counterfeit drugs. They report ...
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