机器会对标签位置的进行控制，以使产品在标签驱动电机开始运行前在传输带上保持一定的滞后距离。
The label position control is used to enter a delay distance of travel for the Product before the label drive motor begins to move.
如果在记录时间内仪器移动，则测量的有效中心和刚开始的测量点有一定的距离，这一距离就是滞后距离。
If the tool is moving during this period, the effective center of measurement will be a certain distance from the point at which the measurement started. This distance is the lag.
分层开采与综放开采工作面滞后支承压力变化规律是，随着采高的增大，工作面滞后支承力的距离加大，垂直应力集中系数差别不大。
The lag distance of abutment pressure behind working face increases, but the convergence coefficient of vertical stress doesn't change obviously with the increase of mining height.
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