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A United States Navy Aviation boatswain's mate tests the specific gravity of JP-5 fuel
A United States Navy Aviation boatswain's mate tests the specific gravity of JP-5 fuel
An empty glass pycnometer and stopper
An empty glass pycnometer and stopper
A filled pycnometer
A filled pycnometer
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A test tube holding four non-miscible colored liquids with different densities
A test tube holding four non-miscible colored liquids with different densities