A second object of this invention is to provide {HEAD ~ a method} for controlling {TAIL ~ an optical disk system} 
for controlling
A second object of this invention is to provide { HEAD ~ a method } for controlling { TAIL ~ an optical disk system }
OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL