Use sweep 1 rail to create an auxiliary surface.
使用扫描一日铁路创造一个辅助表面。
Auxiliary surface is commonly used as a graphic solution for the projections of the intersection line of quadratic cambers of revolution.
在两个二次回转曲面体相贯线的求解中，辅助面法是常用的图解方法。
Surface active agent, auxiliary, water softener and whitener.
表面活性剂、助剂、软水剂、增白剂。
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