所属栏目：金属材料
标准筛网号与目数换算见表1-9。表1-9 标准筛网号与目数换算网号/号目数/目孔数/(个/cm2)网号/号目数/目孔数/(个/cm2)网号/号目数/目孔数/(个/cm2)网号/号目数/目孔数/(个/cm2)542.560.6328125.440.301605760.088160—4540.6301440.28656760.07718051843.226 ......（本文共 741 字 ） [阅读本文] >>
知识贝壳