{TAIL ~ Bonded magnets} are aligned around {HEAD ~ a shaft} so as to form a roller shape magnetic body as shown in FIG 2 
{ TAIL ~ Bonded magnets } are aligned around { HEAD ~ a shaft } so as to form a roller shape magnetic body as shown in FIG 2
TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH