這個可以過濾區域過小或過大的區塊，將它不要顯示出來，可以用於過濾雜訊區塊等用途-this region can filter too small or too large blocks, it will not show up filter can be used for other purposes, clumpping

這個可以過濾區域過小或過大的區塊，將它不要顯示出來，可以用於過濾雜訊區塊等用途-this region can filter too small or too large blocks, it will not show up filter can be used for other purposes, clumpping

cad下钢筋面积文字过滤程序，可以对超过的文字显示红色。-Reinforced area text filter in AutoCAD, can display red for more than text.