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61.如何利用彩色金相法进行相的鉴别?62.什么叫干涉层金相技术?63.如何制备定量金相所要求的高反衬试样?64.何为单相显示,其依据是什么?65.提高反衬有几种光学方法?66.如何测定厚度为几个微米的表层组织?
61. How to use the color metallographic method to identify the phase? 62. What is the interference layer metallography? 63. How to prepare quantitative metallographic required high contrast test sample? 64. What is the single-phase display, based on what is the 65? There are several ways to improve the contrast optical? 66 How to determine the thickness of a few microns of surface tissue?