機械及設備，機電設備及部件，設備或複製，錄音，電視圖像及聲音錄製或重放器具，及這類製品的零件及附件, 85 Electrical machinery and equipment and parts thereof; sound recorders and reproducers, television image and sound recorders and reproducers, and parts and accessories of such articles, 85.33 -electrical resistors (including rheostats and potentiometers), other than heating resistors; parts thereof:, 85.33.3 -electrical resistors (including rheostats and potentiometers), other than heating resistors; parts thereof: --wirewound variable resistors (including rheostats and potentiometers), 85.33.39 -electrical resistors (including rheostats and potentiometers), other than heating resistors; parts thereof: --wirewound variable resistors (including rheostats and potentiometers) ---other, 業務, 業務