When an electric heating method is used forheating, thermal couple and heating coil should be installed closest to the bevel while should not hinder the access of welder to the joint.
采用电加热法加热时，需注意热电偶及加热圈的安装要尽可能靠近坡口，但不得妨碍焊工接近接头。
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A boosting circuit for use in an induction heating unit forheating an object includes a switch element, a first coil, a second coil, and a capacitor.
The paper introduces a coating with high temperature resistance and insulating property for surface insulation process of electric heater coil of heating coil in automobile cigar lighter.