我局每年小流域规划、保水、小型工程的前期工作和施工项目,均需大量图纸。由于技术人员少,放大图纸工作量大,往往影响工作的进行。1982年我局购置了一台普通照像放大机,在放大照片时,将一张有字的白纸置于底片夹上,打开爆光灯在像纸板上的字迹清楚,这一启示我们用放大机来放大图纸。 Our annual small watershed planning, water retention, pre-small works and construction projects, require a large number of drawings. As less technical staff to enlarge the workload of drawings, often affect the work. In 1982, our bureau purchased an ordinary photographic magnifier. When magnifying a photo, we put a white piece of paper on the film holder and made it clear that the writing of the exposure lamp on the cardboard was clear Machine to enlarge drawings.