一般钳工,特别是制作样板的钳工经常用直角尺测量工件。由于工件的尺寸大小不一,使用固定尺寸的直角尺很不方便,所以大多数人都用度尺来量,这也很不方便,同时测量直角使用度尺也很不经济。因而在技术革命中,我厂孟庆智同志创造了如附图所示的活动直角尺。这样一来,不但使用轻便,根据工件大小可随时调整,同时,制造也容易, The fitter, especially the fitter who makes the model, often uses a square ruler to measure the workpiece. Due to the different sizes of workpieces, it is very inconvenient to use square ruler with fixed size, so most people use ruler to measure it. This is very inconvenient. It is also uneconomical to measure ruler at right angles. Therefore, in the technical revolution, Comrade Meng Qingzhi of our factory created the square of activity as shown in the attached figure. As a result, not only the use of lightweight, according to the size of the workpiece can be adjusted at the same time, manufacturing is also easy,