我厂近年来接受了上级下达制造500毫米移动式胶带输送机的任务。全厂职工在毛主席的革命路线指引下,自力更生、艰苦奋斗,克服了厂小设备差的困难,大力开展技术革新,不断改进工艺,较好地完成了这项下达任务。我厂去年生产HQ69—15型移动式胶带输送机40台,每台需用轮圈二件,其形状如图1。 In recent years, our factory has accepted the task of manufacturing superior 500mm movable belt conveyor. Under the guidance of Chairman Mao’s revolutionary line, the entire factory workers, self-reliance and arduous struggle to overcome the difficulties of small plant equipment, vigorously carry out technological innovation, continuous improvement of technology, the better completion of this task. Last year, our factory produced 40 sets of HQ69-15 mobile tape conveyors, each with two wheels. The shape is shown in Figure 1.