The 3d motion parameter measurement of a rocket motor nozzle is a premiss for accurately controlling the nozzle, and the calibration equipment is the key to ensure motiontesting at a high precision.
火箭发动机喷管三维运动参数的测试是对其精确控制的前提，其校准装置是保证测试精度的关键。
2
Study Design. Dynamic triaxial biomechanical testing of immature and mature ovine spine motion segments.
研究设计：动态三维生物力学方法测试幼年和成年羊的脊柱运动节段。
3
For example, in the universal testing machines, the motion between the fixed and moving crossheads can be controlled at a constant speed.