Cables; Conductors; Insulators; Selection Of Materials For Their Conductive, Insulating Or Dielectric Properties
H01F
Magnets; Inductances; Transformers; Selection Of Materials For Their Magnetic Properties
B22F
Working Metallic Powder; Manufacture Of Articles From Metallic Powder; Making Metallic Powder ; Apparatus Or Devices Specially Adapted For Metallic Powder
C21D
Modifying The Physical Structure Of Ferrous Metals; General Devices For Heat Treatment Of Ferrous Or Non-ferrous Metals Or Alloys; Making Metal Malleable, E.g. By Decarburisation Or Tempering
