{HEAD ~ Curve C} represents {TAIL ~ the amount} of expansion or contraction of fine displacing element 112 from its central position 
represents
{ HEAD ~ Curve C } represents { TAIL ~ the amount } of expansion or contraction of fine displacing element 112 from its central position
HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH