在没有专用设备时,如果要检验大于500毫米的大角尺,可以用万能量具组成一定形式来进行。这种方法所用的量具及其检验操作方法如下:在一块大平板上(稍大于被检验的角尺),放上三根检验平尺1、2、3(如附图)。先用带有支架的千分表5使两根平尺1和2相互平行,然后用 In the absence of special equipment, if you want to test large square feet larger than 500 mm, you can use a gantry to form a certain form. This method uses the measuring tools and inspection methods are as follows: On a large flat (slightly larger than the square to be tested), put three test tape Ruler 1,2,3 (Figure). First with a dial gauge with a bracket 5 so that the two flat feet 1 and 2 parallel to each other, and then use