测微器隙动差是测微器机械误差中的一种，它本身带有系统误差性质，人们可以通过正确的操作方法给以消除或减少，同时也可以改进测微器的构造加以消除。关于前者，本刊1963年3期梁以坚同志提出关于“旋进”问题的讨论，确应引起各作业单位注意，由于过去我国绝大部分仪器，特别是精密经纬仪多由国外进口，型号、品种、精度不一，在仪器的制 Micrometer gap tolerance is a micrometer mechanical error, which itself has the nature of systematic errors, people can correct or eliminate the operation to eliminate, but also can improve the structure of the micrometer to be eliminated. As for the former, the discussion on the issue of “precession” put forward by Comrade Liang Yijian in our journal of 1963 3 period really aroused the attention of all operating units. In the past, most of the instruments in our country, especially theodolite, were mostly imported from abroad, and their models, varieties, Different accuracy, in the instrument system