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Could be Opiate Treatment Index or Orotracheal Intubation or Ovomucoid Trypsin Inhibitor
well it has a tube, and that tube is within a tube. therefore, the tube is somehow within the tube. that explains it
No. Levin tube is not the same as the Blakemore tube.
The answer is the auditory (Eustacean) tube.
A sample tube, culture tube, sometimes a boiling tube.