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