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Test tube holders have much more use in biology than in chemistry. They can allow you to (micro)pipette into many samples at once and generally support many reactions. They allow
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use to hold test tube..
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It is used to support the " TEST TUBE ", it can also hold the " TEST TUBE" .
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A test tube is typically used for scientific experiments. They are used to contain specimens, to identify specimens, to heat and cool elements, and to mix specimens. Generally, this
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