A method of detection for parcels is to ensure separation is performed by mechanical equipment prior to directing {HEAD ~ the sensing devices} towards {TAIL ~ the parcel} 
towards
A method of detection for parcels is to ensure separation is performed by mechanical equipment prior to directing { HEAD ~ the sensing devices } towards { TAIL ~ the parcel }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL