The current intensity of variations will produce self-induction when a closed coil moves in magnetic field. Must be attended to the contribution of the current by self-induction to total current.
闭合线圈在磁场中运动，线圈中的电流变化将产生自感，自感电流对总感应电流的贡献是不容忽视的。
The helically wound coil may be movable laterally in the groove between a melt channel open position and a melt channel closed position to open or seal the melt channel.
所述螺旋缠绕线圈可在所述槽内在一熔体通道打开位置与一熔体通道关闭位置之间横向移动，以打开或密封所述熔体通道。
On the other hand, in order to meet the security needs of operation, the insulation must be closed shell, which will lead to difficulty in cooling coil.
另一方面，为了满足操作的安全需要，必须采用封闭的绝缘外壳，而这将导致线圈散热困难。
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