Sets the current drawing mode.
设置当前的绘图模式。
The drawing mode is for raster devices only;
绘图模式仅用于光栅装置；
The drawing mode is for raster devices only; it does not apply to vector devices.
绘图模式仅用于光栅装置；它不用于向量装置。
The drawing mode specifies how the colors of the pen and the interior of filled objects are combined with the color already on the display surface.
绘图模式指定了如何把画笔和填充物的内部颜色与显示表面已存在的颜色进行组合。
High dilution for sublevel caving is caused by existing drawing mode. Using thd undilutiondrawing can greatly decrease the ore dilution below 8% without decreasing recovery.
无底柱分段崩落法贫化大是由现行放矿方式造成的，改用不贫化放矿后可使矿石贫化率在回采率不降低情况下大幅度下降到8％以下。
High dilution for sublevel caving is caused by existing drawing mode. Using thd undilutiondrawing can greatly decrease the ore dilution below 8% without decreasing recovery.
无底柱分段崩落法贫化大是由现行放矿方式造成的，改用不贫化放矿后可使矿石贫化率在回采率不降低情况下大幅度下降到8％以下。
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