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