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