{TAIL ~ an adaptor member} adapted to be fitted to the second supporting section and formed with {HEAD ~ a guide groove} for pinching the sub shaft, and 
{ TAIL ~ an adaptor member } adapted to be fitted to the second supporting section and formed with { HEAD ~ a guide groove } for pinching the sub shaft , and
TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH