- principal axis of inertia
- 惯量: inertia; inertness
- 主轴: principal axis; chief axis; ...
- 应力张量主轴: principal axis of stress tensor
- 惯量: [物理学] (物体惯性的大小) inertia; inertness
- 主轴: [机械工程] principal axis; chief axis; main arbor; main axle; main spindle; mainshaft; principal shaft; spindle; [光学] main optic axis◇主轴箱 main spindle box; main spindle head; spindle box
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