Test tube holder
A test tube holder is used to hold test tubes. It is used for holding a test tube in place when the tube is hot or should not be touched.
A test tube holder is used to hold test tubes. It is used for holding a test tube in place when the tube is hot or should not be touched.
A test tube holder is used to hold test tubes. It is used for holding a test tube in place when the tube is hot or should not be touched.
Source: Wikipedia "Test tube holder" · CC BY-SA 4.0
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