在中小型交流电动机中，大多数线圈是散绕的。
In small and medium-size ac motors, most coils are random-wound.
本文应用几何绕射理论对介质覆盖体上过渡区和焦散区的场进行了详细地分析。
The fields in transition and caustic region of dielectric coated objects are obtained by geometric theory of diffraction.
但由于此两种方法的波散现象，存在绕射波收敛不完全等问题。
Merely the wave dispersion, the convergency of diffracted wave is, in most cases, incomplete.
但由于此两种方法的波散现象，存在绕射波收敛不完全等问题。
Merely the wave dispersion, the convergency of diffracted wave is, in most cases, incomplete.
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