Such a device is constructed in the form of a toggle mechanism on which {HEAD ~ further fine control movements} can be imposed through {TAIL ~ a series} of adjustment possibilities 
imposed through
Such a device is constructed in the form of a toggle mechanism on which { HEAD ~ further fine control movements } can be imposed through { TAIL ~ a series } of adjustment possibilities
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH