printer control character [计] 打印机控制字符
The principle of the former is to control character height like stylus printer while the principle of the latter is quite different.
前者的字符高度的控制方法类似针式打印机，而后者的控制原理则完全不同。
Given the data of control Wells in a given area, the drawing will be done on the printer by calculation of the parameters at the netted nodes and digit-character conversion.
基本原理是根据研究地区内控制井的资料，求得该区域网格化后各节点处的参数值，经过数字-字符转换处理，由打印机实现绘图。
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