{HEAD ~ The present invention} relates to an apparatus and {TAIL ~ method} which enables a technician to hold a microcentrifuge tube in one hand, and to open and close the cap without requiring a second hand 
relates to
{ HEAD ~ The present invention } relates to an apparatus and { TAIL ~ method } which enables a technician to hold a microcentrifuge tube in one hand , and to open and close the cap without requiring a second hand
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