principal axis meaning in English

主轴, 光轴

This rotation can be simplified by plotting the positions of the principal sections and principal axis on a stereographic net as described by jessop and wells from the rotations recorded .
按照杰索普和威尔士所论述的方法，根据记录下来的转动角，把主截面和主轴的位置画到一个极射赤平投影网上，可使上述过程简化。
Central principal axis of inertia
中心惯性轴
Principal axis design of jk type mineral well lift machine and trial of improvement
型矿井提升机主轴设计及改进的尝试
Set up three great principal axises of joint development between jiangsu and western region
构建江苏与西部联动发展的三大主轴
Principal axis of strain
主应变轴

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