一、部苏联专家组长卡札柯夫同志谈: 1.统一为外径定中心: 苏联直齿花键连接有内径定中心,也有外径定中心,两者都是法定的标准,发展趋势是外径定中心。目前苏联有些厂还是内径定中心,这是因为这些厂生产量很大,原有量规、拉刀、花键磨床及其它设备都很多,短时间内从内径定中心 I. Comrade Katsakov, head of the Soviet Union’s expert team, talked about the following: 1. Unification as centering of outer diameter: The centering of the centering of the spur gears in the Soviet Union and the centering of the outer diameters are both statutory standards and the trend of development Is the diameter of the center. At present, some factories in the Soviet Union are still centering on the inner diameter. This is because these plants produce large quantities of gauges, broaches, spline grinders and other equipment. In a short period of time,