在无产阶级文化大革命和批林批孔运动的推动下,我厂广大职工以阶级斗争为纲,深入开展“工业学大庆”的群众运动。在一无资料、二无经验的困难条件下,工人、干部、技术人员三结合,放手发动群众,向兄弟单位学习,边设计、边试制、边改进,研制成功HNYD2—1型信函过戳机。并于一九七五年八月,由浙江省邮政局会同有关部门进行了初步鉴定。 Driven by the great proletarian cultural revolution and the pro-Lin campaign, the vast majority of our factory workers took the class struggle as the key link and carried out the “mass movement of Daqing in industry”. In the absence of information, two inexperienced and difficult conditions, the three workers, cadres and technicians combine to let go mobilize the masses to learn from the fraternal units, while designing, while trial system, while improving, the successful development of HNYD2-1 letter stamper . In August 1975, Zhejiang Provincial Post Bureau together with relevant departments carried out preliminary appraisal.