Tolerances cover dimensional variation and surface-roughness range and also the variation in mechanical properties from heat treatment and other processing operations.

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。

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The steel dies with high dimensional accuracy, low surface roughness and long service life have been quickly produced by using prototyping resin molds as patterns of ceramic investment casting.

直接利用激光快速成型的原型树脂模，结合陶瓷型精密铸造技术，制得了高精度、低表面粗糙度、高使用寿命的钢模具。

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Both dimensional accuracy and surface roughness of the metal handicraft in ceramic mold meet technological requirement.

该陶瓷型用于制作金属工艺品，尺寸精度和表面粗糙度均达到技术要求。

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