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苏联以斯大林命名的新克拉马托尔斯基重型机器厂,根据实际的生产经验确定了一系列关於重型机器另件加工表面几何形状及其相互位置的公差值。现对下列各表的使用作以下几点就明:[表一]及[表二]中的公差值是根据OCT公差制度中的精度等级来选择;[表四]至[表九]、及[表十一]则根据下列三个精度等级来选择:Ⅰ级精度——用於特别精密的另件。这种另件的几何形状应最大限度地接近於正确的几何形状。Ⅱ级精度——用於精密的另件。这种另件的几何形状
The New Kramatorski Heavy Machinery Plant, named after Stalin, determined a series of tolerances on the machined surface geometry and their mutual positions of heavy parts based on actual production experience. The following are some examples of the use of the following tables: The tolerance values in [Table 1] and [Table 2] are selected based on the level of precision in the OCT tolerance system; [Table 4] to [Table 9] And [Table 11] are selected based on the following three levels of accuracy: Level I Accuracy - for special precision parts. The geometry of such an attachment should be as close as possible to the correct geometry. Ⅱ grade precision - for the precision of the other pieces. The geometry of this other piece