layer of rods and cones 网膜棒锥层 ; [组织] 视杆视锥层 ; 杆状锥状细胞层
The rods are used in steel water heater tanks - an aluminum tank has an inner layer of anode metal to accomplish the sa me thing. Anode rods should not be installed in an aluminum tank!
在钢热水器容器中使用的燃料棒，对比一个铝制罐内层金属阳极都能完成同样的事情，所以阳极棒不应该安装在一个铝制罐里。
The analytic computational formula for grounding resistance of grounding rods in three-layer soil is derived based on the concept of equivalent soil resistivity.
基于等值土壤电阻率的概念，导出了三层土壤中垂直棒接地电阻解析计算公式。
The enamel layer of a tooth is made up of hydroxyapatite crystals, which form microscopic "rods".
牙齿最外层的牙釉质是由我们肉眼看不到的显微小管所组成的。
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