{HEAD ~ The motor} 20 is enclosed within {TAIL ~ a casing} 23 which has a downwardly depending pin 231 pivotally connected to the other end of the oscillating arm 24 
is enclosed within
{ HEAD ~ The motor } 20 is enclosed within { TAIL ~ a casing } 23 which has a downwardly depending pin 231 pivotally connected to the other end of the oscillating arm 24
HEAD HEAD HEAD HEAD HEAD HEAD OTH REL REL REL 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