{HEAD ~ These one more internal features} can be formed singly or concurrently by use of {TAIL ~ the single molding tool} 
{ HEAD ~ These one more internal features } can be formed singly or concurrently by use of { TAIL ~ the single molding tool }
HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL