在轰轰烈烈的“工业学大庆”的群众运动中,山东省昌潍建筑工程公司青年工人遵照毛主席“破除迷信,解放思想”的教导,在有关单位的协助下,自行设计,经过一个月几十次的反复试验,反复实践,不断总结、改进和提高,终于成功地制作了一台晶体管钢筋混凝土保护层探测仪(图1)。 In the vigorous “Daqing Industrial Science” mass movement, young workers from Shandong Changyi Construction Engineering Company followed Chairman Mao’s teachings of “removing superstition and emancipating the mind” and with the help of the relevant units, they designed themselves and went through dozens of months. Repeated trials, repeated practice, continuous summing up, improvement, and improvement have finally succeeded in producing a transistor reinforced concrete protective layer detector (Figure 1).