{TAIL ~ The resin case} is sandwiched by an upper yoke and {HEAD ~ a lower yoke} 
{ TAIL ~ The resin case } is sandwiched by an upper yoke and { HEAD ~ a lower yoke }
TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD