The structure design and quality of planetary carriers are closely related to the load distribution among planetwheels, the carrying capacity, noise and vibration of gears.
行星架的结构设计和制造质量，对各行星轮间的载荷分配以至传动装置的承载能力、噪声和振动等有很大影响。
2
Its wheels and gears create a portable orrery of the sky that predicted star and planet locations as well as lunar and solar eclipses.
其轮盘和齿轮制造出一种可携带的太阳系天体仪，可以预测恒星和行星的位置，也能预测月食和日食。
3
Or gaze at a red planet and see a laboratory on wheels?