This is due to the variation of the surface tension which make them spread to oil films with a stable ratio.

聚并前后的油膜半径变化规律与球状油滴聚并变化规律一样，这是对油滴按比例铺展成油膜的自然推论。

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This is due to the variation of the surface tension which make them spread to oil films with a stable ratio.

聚并前后的油膜半径变化规律与球状油滴聚并变化规律一样，这是对油滴按比例铺展成油膜的自然推论。

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