central cylinder

常见例句

The central cylinder in which the primary vascular tissue is arranged around a pith, as in most seed plants.
一种管状中柱，其中初生脉管组织排列在髓孔周围，存在于大多数种子植物中。
In this paper the problems of data processing are solved by uniting the data of design technology and measurement into a central cylinder .
提出将设计、艺、测基准统一于中心圆筒的方法，解决了数据处理难点问题。
The smaller, central cylinder is called the Collision Airspace Zone (CAZ). It envelops the aircraft tightly and always remains the same size.
中间较小的圆柱形叫做“碰撞空域”（CAZ），它紧紧围绕飞机并一直保持大小不变；