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this is an instrument in the laboratory that is used to clean various kinds of test tubes.
Fire polisihing is used for the polishing of glass tube ends or other glass laboratory components; it is possible to use this method also for plastics.
In the laboratory the funnel is used for filtrations.
Heating should be slow.The test tube should not be full.Work in a laboratory hood.
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burette
Transformers are inherently bidirectional.
Relays are bidirectional devices.
Container of liquid/chemical
Red sst
Test Tube brushes are used to easily clean the test tubes .
used to chemical test
John Detours
Container of liquid/chemical
apparatus