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Engineering, 13.11.2019 00:31 palmekar000

How is this done? you want to place a piece of glass tubing into a rubber stopper after the tubing has been fire polished and cooled. a. lubricating the tubing with water or glycerin. b. using a towel or cotton gloves for protection. c. twisting the tubing and stopper carefully. d. all of the above.

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How is this done? you want to place a piece of glass tubing into a rubber stopper after the tubing...
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