As a result, the tension on {TAIL ~ the clasp} cannot act as {HEAD ~ a force} effective to pull apart the metallic parts 11 and 21 
As a result , the tension on { TAIL ~ the clasp } can not act as { HEAD ~ a force } effective to pull apart the metallic parts 11 and 21
OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH