internal processing短语²²¹⁵⁵ 基本例句 内部处理 Because there was no effective belt leading mechanism, the belt grinding usually could not be used for internal processing, especially small diameter internal/span> processing. 由于缺少有效的将砂带导引入内孔机构，使目前砂带磨削无法普遍应用于内回转表面的加工。 chemyq