It is also desirable to provide a disc drive unit that can share {HEAD ~ an optical pickup} with {TAIL ~ one or more than one other disc drive units} having respective pairs of oppositely disposed guide shafts that are separated from each other by different distances by fitting such an adaptor member so as to reduce the cost 
with
It is also desirable to provide a disc drive unit that can share { HEAD ~ an optical pickup } with { TAIL ~ one or more than one other disc drive units } having respective pairs of oppositely disposed guide shafts that are separated from each other by different distances by fitting such an adaptor member so as to reduce the cost
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL 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 OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH