It is a quadruple spiral structure built up of identical elements.
它的主体是一个四联体的螺旋形结构。
Viewed face on, it would look like a smooth, flat disk with little spiral structure.
面对看，它看起来像一个平稳，很少有螺旋结构扁平盘。
This line of reasoning underlies an exciting new theory of spiral-galaxy structure.
这一推理路线是一个令人兴奋的螺旋星系结构新理论的基础。
Pair of axles, spiral feed type blade structure, best efficient breaking.
双轴心，螺旋进刀式刀片结构，破碎强而有力。
Pair of axles, spiral feed type blade structure, best efficient breaking.
双轴心，螺旋进刀式刀片结构，破碎强而有力。
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