修理汽车底盘时,修理工爬进爬出,在车底下仰面工作,很费劲。我们参照国外经验制作一台如图所示的小车,经使用效果很好。小车的车身前段2,与车身后段5,是两体,可以折叠。不用时,以轴销3为中心,两端向下,中问提起,便能叠起来,携带、保管部很方便;使用时,将它展开放平,比人身体稍宽且短,下面有4个球形万向轮6,可以 Repair car chassis, the mechanic climbed climbed out, the bottom of the car work under the sun, very hard. We refer to foreign experience in the production of a car shown in the figure, the use of good results. Car body front section 2, and the rear body 5, is two body, can be folded. When not in use, with the pin 3 as the center, both ends of the down, asked to mention, will be able to stack up, carrying, storage is very convenient; use, it will be flat, slightly wider and shorter than the human body, below 4 spherical caster 6, yes