Concurrently {HEAD ~ a stable positioning} of the measurement device onto {TAIL ~ a placement area} is achieved 
onto
Concurrently { HEAD ~ a stable positioning } of the measurement device onto { TAIL ~ a placement area } is achieved
OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH