agent various soft magnets magnetic ring; korea CSC; M pp; C ores; SUNDUST; C ores; HIGH-FLUX; C ores; korea AMOTECH; magnetic ring (Co); korea AMOTECH; magnetic ring (Fe); MAG; AMP; MAG; SWITCH; Steward; ferrite EMI; Magnetic ring; japan JFE; Manganese-zinc series ferrite magnetic ring; PFC; Inductance; Emi inductance; various transformer