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You want to place a piece of glass tubing into a ruber stopper after the tubing has been fire polished and cooled. This is best done by
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You want to place a piece of glass tubing into a ruber stopper after the tubing has been fire polished and cooled. This is best done by

User Peter Staev
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5 votes

Answer:

All of the above

Step-by-step explanation:

This is correct

User Hartwig
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