Unclassified
Secchi disk
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Unclassified
Secchi disk
Tool used to measure water transparency/turbidity
epic · Q575941
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Unclassified
Compass (drawing tool)
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_Scrubber.jpg/330px-Carbon_Dioxide_(CO2)_Scrubber.jpg)
Unclassified
Carbon dioxide scrubber
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Unclassified
Dark Energy Spectroscopic Instrument
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Unclassified
Fizeau's measurement of the speed of light in air
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Interferometric synthetic-aperture radar
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Unclassified
Barlow lens
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