河南省科委計量管理局1964年5月在許昌市举办了质量計量訓练班。这次訓练班的主要讲授內容是:天平的一般理論、天平的結构与維修技术、近似数的計算以及天平砝碼检定規程。参加学习的共有30人,其中30％学員来自专、市計量所,他們有一定的实际工作經驗,但缺乏系統的理論知识。經过一个多月的短期培訓,学习 Science and Technology Commission of Henan Province Metrology Authority in May 1964 in Xuchang City held a quality measurement training course. The main content of this training course are: the general theory of balance, the balance of the structure and maintenance techniques, the calculation of the approximate number and balance weight verification procedures. A total of 30 people participated in the study, of which 30% of trainees from the city and city metrology institutes, they have some practical work experience, but the lack of systematic theoretical knowledge. After more than a month of short-term training, learning