The stationary portion and {HEAD ~ the piezoelectrically adjustable portion} of {TAIL ~ the intermediate part} are joined to one another by means of a parallel spring guide 
The stationary portion and { HEAD ~ the piezoelectrically adjustable portion } of { TAIL ~ the intermediate part } are joined to one another by means of a parallel spring guide
OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH