布线器为没有对齐的引脚创建直角走线来弥补，直角走线强迫了通道在垂直方向上扩大并且增大芯片尺寸。
The router creates jogs to compensate for pins that are not aligned. This forces the channels to expand vertically and increases the die size.
当被测要素为轴线、中心线或对称平面时，指引线的箭头和基准符号应与该要素的尺寸线对齐。
If the element being tested with tolerance requirements is an axis, centre line or symmetrical plane, the arrow and datum symbol should be aligned to the dimension line of that element.
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