随着机械、电子等行业的发展,对产品质量的要求必将越来越高。在量值传递中,对平面基准的要求就要相应提高。人们从实践中发现,岩石平板具有稳定性能好、不易变形、耐酸碱、抗腐蚀、使用中无涩感、使用后不用油封,适用性广并且造价低等诸多优点。不仅消除了铸铁平板的各项缺点, With the development of machinery, electronics and other industries, the product quality requirements will certainly be higher and higher. In the mass transfer, the requirements for the plane reference should be increased accordingly. People have found from practice that the rock slab has many advantages such as stable performance, easy deformation, acid and alkali resistance, corrosion resistance, no astringency in use, no oil seal after use, wide applicability and low cost. Not only eliminates the shortcomings of cast iron flat,