The smaller the computer, the lighter the motors, the smaller the batteries, the smaller the structure, and the stronger the frame became relative to its size.
电脑部件越小，电机就可以越小，电池也越小，构架也越小，对应其尺寸的结构强度就越大。
2
On the base of the relative theories and the study on the low-rent housing system in Shanghai, it puts out the main study methods and the main frame.