Root cylindric, to 2 cm in diam. Caudex short, simple or rarely branched.
圆筒状的根，在2厘米直径块根短，单或很少分枝。
The generalized reflection-transmission coefficient matrix method is developed to study the acoustic wave propagation in a layered cylindric symmetric medium.
本文将广义反射、透射系数矩阵方法推广用于研究声法测井中的声波传播问题。
The lensometers is also called measural lens dioptre instrument, to measure spherical lens dioptre, cylindric lens dioptre and axis, prism dioptre, and lens optical center etc.
顶焦度计又称对光机、查片机，可用来测量球光镜镜度、散光镜镜度、棱镜镜度以及散光轴线和光学中心点等，是眼镜片冷加工中必不可少的检测仪器。
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