As shown in FIG 3, the iron core 11 is formed of particles 14 of iron or an iron based magnetic material filled in {HEAD ~ a casing} 13 which is made of {TAIL ~ an insulating synthetic resin} such as phenol and nylon 
is made of
As shown in FIG 3 , the iron core 11 is formed of particles 14 of iron or an iron based magnetic material filled in { HEAD ~ a casing } 13 which is made of { TAIL ~ an insulating synthetic resin } such as phenol and nylon
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 HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH