From the view of strati graphy they all belong to the cretaceous period.
从地层学上看，它们都属于白垩纪。
Based on sequence strati graphy work for the outcrops in tarim basin the author sets up the sealevel changes curve of sinian period to devonian period.
根据对塔里木盆地露头剖面的层序地层学研究，建立了震旦-泥盆纪古海平面变化曲线。
This new method not only is convenient to solve the graphy of intersecting curve of paraboloid of revolution, but also can solve some graphic problems which can not be …
它不仅对解决有关旋转抛物面交线的作图问题提供了很大的方便，同时还能解决一些用画法几何的一般作图法所不能解决的作图问题。
This new method not only is convenient to solve the graphy of intersecting curve of paraboloid of revolution, but also can solve some graphic problems which can not be …
它不仅对解决有关旋转抛物面交线的作图问题提供了很大的方便，同时还能解决一些用画法几何的一般作图法所不能解决的作图问题。
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