效仿理想点磁极的物理模型，对实际磁针建立了分子电流细螺管的物理模型，并分析了库仑磁作用定律成立的条件。
Imitating the physics model of ideal magnetic pole, magnetized needles are modeled on many thin soleniodal circuits of molecular el…
测量方法：为使测点的位置准确，在测量前应根据磁极形状制作测点样板(用有机玻璃板或木板)。
Measuring method: in order to make the point location accurate, in measurement shall, before making point polarity shape according to the sample (with organic glass or planks).
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