论文部分内容阅读
1.把一枚粗缝衣针,有穿线孔的一端烧红,插入塑料筷的细端。再把筷的粗端插入粘土块中(石蜡更好),待其干固后,即成为一具针形支柱(图1)。 2.把一根细玻璃管放在酒精灯上加热后,拉成一个尖端,再在尖端一端截取一段,在开口处再加热后放在桌面上狱一下,形成一个喇叭卷口,这就是一个小的活动轴承(图2)。吞图i图2 3.用两根20号左右的漆包线(铅丝也可以),绞合起来,做成一个可以放摩擦棒的支架,在中间做一小孔,把活动轴承固定在其
1. Put a thick sewing needle, one end with a threading hole, into the thin end of plastic chopsticks. Then insert the thick end of the chopsticks into the clay block (paraffin wax is better), and after it is dried, it becomes a needle-shaped pillar (Figure 1). 2. Put a thin glass tube on the alcohol lamp and heat it. Pull it into a tip and then cut it at one end of the tip. Heat it in the opening and put it on the table for a moment to form a horn reel. This is a Small movable bearing (Figure 2). Fig. 2 3. Using two 20-gauge enameled wires (lead wire is also available), twist them together to form a bracket on which the friction bar can be placed. Make a small hole in the middle and fix the movable bearing on it.