The ideal rock sample is the conical surface rock sample that can joint crest of teeth in single row drilling experiment.
在单齿圈破岩试验中，理想的岩样是与牙齿齿顶线相贴合的锥面岩样。
According to the principle of constructing elliptical conical surface by the circles on a sphere, a T-joint inscribed in a sphere is designed.
根据“球面上圆构造椭圆锥面”的原理，设计了球内接三通接头。
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.
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；
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