{HEAD ~ The spring force} is coupled to the test member via {TAIL ~ a movable member} which moves in a substantially frictionless manner 
is coupled via
{ HEAD ~ The spring force } is coupled to the test member via { TAIL ~ a movable member } which moves in a substantially frictionless manner
HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL OTH OTH OTH OTH REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH