{TAIL ~ a middle portion} between said two free ends; {HEAD ~ said middle portion} disposed in the borehole of the first component and each said free end protruding from an opposite borehole opening of the borehole; and 
{ TAIL ~ a middle portion } between said two free ends ; { HEAD ~ said middle portion } disposed in the borehole of the first component and each said free end protruding from an opposite borehole opening of the borehole ; and
TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH