植物胚胎发育中 的不对称分化建立了两条极性体轴：顶基轴（apical-basal axis）和径向轴（radial axis）。其中，顶基轴区分了根和茎两极；径向轴确定了围绕顶基轴的各层组 织的位置。
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单列径向轴承 single row radial bearing
混合式径向-轴式轴承 combined radial-axial bearing
径向轴封 radial shaft seal
上部径向轴承传动接头 radial bearing upper drive sub
下部径向轴承传动接头 radial bearing lower drive sub
径向轴承的检修 Maintenance of radial bearing
下径向轴承 lower radial bearing
静压径向轴承 hydrostatic radial bearing
径向轴径轴承的种类为多楔径向轴径轴承。
转子-轴承系统中包括弹性轴、刚性圆盘以及具有阻尼和刚性的径向轴承。
The system consists of elastic shaft , rigid disks and bearing which has damping and stiffness.
当两个电极之间形成电场时，压电性物质便将电场转化为沿径向轴的机械压力，使纤维震动。
When an electric field is applied to the electrodes the piezoelectric material translates this into a mechanical strain along its radial axis, causing it to vibrate.
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