有没有必要预设的纸张尺寸或分辨率，在绘图过程中或调整画布。
There is no need to preset paper sizes or resolutions or to resize the canvas during drawing.
目前，在连轧生产中，由于对尺寸精度要求的不断提高，要求轧制机预设定更加灵活和准确。
At present, in continuously rolling production, because of the unceasing raising that asked for size precision, people ask the advance setting of rolling machine becoming more accurate and flexible.
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