A reference position of the presetting device is measured prior to {TAIL ~ a first use} of the manual pliers, {HEAD ~ this measurement} involving actuating the manual pliers 
A reference position of the presetting device is measured prior to { TAIL ~ a first use } of the manual pliers , { HEAD ~ this measurement } involving actuating the manual pliers
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH