{HEAD ~ The cambered end} 92 of the brush core includes a pair of aligned slots 93, 94 which receive the keys 90, 91 of {TAIL ~ the cradle} 85 
{ HEAD ~ The cambered end } 92 of the brush core includes a pair of aligned slots 93 , 94 which receive the keys 90 , 91 of { TAIL ~ the cradle } 85
HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH