公差这个概念既包括尺寸偏差范围和表 面粗糙度范围， 也包括由热处理和其它处理操 作所引起的机械特性的变化。
Tolerances cover dimensional variation and surface-roughness range and also the variation in mechanical properties from heat treatment and other processing operations.
提出了基于事物特性表的公差主模型的建立方法，分析了基于事物特性表的公差变型设计过程。
A method of generating tolerance master model based on SML was addressed, and a variant design process based on SML was proposed.
由于表贴器件制造公差的影响，器件与冷板间的接触热阻无法有效控制。
Because of the influences of such factors as machining tolerance etc., the contact thermal resistance between chip and cold plate can't be controlled effectively.
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