{TAIL ~ The above mentioned constitution} and basic operations of {HEAD ~ the ADF} 2 have been disclosed in the specification of Japanese Patent Application No 276388/1991 filed by the present applicant on Sep. 30, 1991 
{ TAIL ~ The above mentioned constitution } and basic operations of { HEAD ~ the ADF } 2 have been disclosed in the specification of Japanese Patent Application No 276388/1991 filed by the present applicant on Sep. 30 , 1991
TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH