四级: level Four; Band Four; Fully ...精度: precision; accuracy; degree ...粗糙级精度: coarse quality二级精度: fine grade分级精度: effectiveness of classification普通级精度: plain grade一级精度: extra fine grade; extra-fine高级精度配合, 一级精度配合: high class fit二级精度配合: fine fit高级精度配合: high class fit; high-class fit特级精度配合: extra fine fit一级精度配合: extra fine fit; extra-fine fit四级: level four; band four; fully good◇四级风 force 4 wind; moderate breeze; 四级火箭 fourstage rocket; 四级考试 band four test精度: precision; accuracy; degree of accuracy; precision accuracy; trueness 高精度 high precision; 精度表 accuracy table; 精度等级 accuracy class; class of accuracy; grade of accuracy; grade of precision; precision class; 精度准则 accuracy criteria参加（四级）: d.participation第四级: fourth stage◇第四级电压范围 fourth voltage range (250伏至660伏)门坎（四级）: a.threshold四级泵: four-stage pump四级的: four stage; quaternary四级风: boderate breeze四级管: quadrode; tetreode; tetrode四级脉: quaternary vein四级片: category four， or hard-core四级区: quaternary area超级精加工: superfinish
