信函过戳机是我厂广大工人在伟大领袖毛主席提出的“工业学大庆”的伟大方针指引下,于一九七三年三月开始研制的。经过无产阶级文化大革命,我厂广大工人,怀着努力改变我国邮政通信落后面貌的雄心壮志,夜以继日的刻苦钻研,克服了技术上、材料上和设备不足的种种困难,终于在当年试制成功。一九七四年十二月经浙江省邮政局会同海宁县科技局进行了技术鉴定,认为该机各项技术指标基本上达到了设计指标和使 The letter stamping machine was developed in March 1973 under the guidance of the great leader of the Great Leader Chairman Mao, the “Great Daqing of Industry”. After the Great Proletarian Cultural Revolution, the majority of workers in our factory, with their ambitions to change the backwardness of China’s postal communications, have worked hard day and night to overcome difficulties in technology, materials, and equipment shortages, and finally succeeded in trial production that year. In December 1974, a technical appraisal was conducted by the Zhejiang Provincial Post Bureau and the Haining County Bureau of Science and Technology, and that the various technical indicators of the aircraft basically reached the design targets and