cn103154293a

CN1251865A - - Google Patents

Discuss; 238000004519 manufacturing process Methods 0.000 title claims abstract description 12; 239000000463 material Substances 0.000 title description 26; 229910000831 Steel Inorganic materials 0.000 claims abstract description 83; 239000010959 steel Substances 0.000 claims abstract description 83; 229910000529 magnetic ferrite Inorganic materials 0.000 claims abstract description 20