removing {HEAD ~ the activated chemical test pad} from {TAIL ~ the sealed package} while said plastic packet remains within the sealed package 
from
removing { HEAD ~ the activated chemical test pad } from { TAIL ~ the sealed package } while said plastic packet remains within the sealed package
OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH