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