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