A resilient member 27 is engaged with {TAIL ~ the projections} 26 at {HEAD ~ the lower end} of the casing 23 for steadying the motion of the oscillating arm 24 
A resilient member 27 is engaged with { TAIL ~ the projections } 26 at { HEAD ~ the lower end } of the casing 23 for steadying the motion of the oscillating arm 24
OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH