{HEAD ~ The present invention} relates to {TAIL ~ the field} of surgical instruments, more specifically a scalpel, indispensable for fundamental maneuvers such as the incision and the dissection in surgical operations on a human body and on an animals body 
relates to
{ HEAD ~ The present invention } relates to { TAIL ~ the field } of surgical instruments , more specifically a scalpel , indispensable for fundamental maneuvers such as the incision and the dissection in surgical operations on a human body and on an animals body
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