材料和成品的硬度,随着产品质量的提高,也必须有精确的要求;在检验室里,车间的检验台上,我们检查工作者也许都切身的体味了这些。硬度的定义空口说起来很难明确的解释出;但在工业上几种常用的硬度检验计和它的基本原理中,我们可以正确的了解它。 根据几种常用硬度计的基本原理, The hardness of materials and finished products, with the improvement of product quality, must also have precise requirements. In the testing room, the inspection booth of the workshop, we may examine the workers for their own taste of these. The definition of hardness Air said it is difficult to explain clearly; but in the industry, several commonly used hardness tester and its basic principles, we can correctly understand it. According to the basic principles of several commonly used hardness tester,