The spherical segment cone module of small lift to drag ratio vehicles is the optimum shape than others.
2
一种能够使首饰项链连接的新型接头，它是应用倒锥形涨压紧固原理制作而成；
The utility model relates to a novel joint which can make jewel necklaces connected, which is made by using the inverted conical pressure expanding and fastening principle.
3
为何至今变为一个倒锥形还不得而知，这与始皇陵的未被盗掘或有关系也说不定。
Why it has become an inverted cone is still unknown, which is not only imperial tombs of the excavation, or has a relationship eventually.
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