最通用的例子是三位置控制器。
图3显示了实现三位置控制器更有效的方法。
Figure 3 shows a more efficient way to implement a three-position controller.
当所述脚踏开关在所述第二位置或者第三位置时作业工具控制锁用来防止所述作业工具控制器启动。
A work tool control lock is used to prevent the work tool control from engaging when the foot pedal is in the second position or the third position.
当所述脚踏开关在第三位置时，所述作业工具控制器的位置被保持并且 所述地面驱动控制器的位置被保持。
When the foot pedal is in a third position, the position of the work tool control is maintained and the position of the ground drive control is maintained.
当所述脚踏开关在第三位置时，所述作业工具控制器的位置被保持并且 所述地面驱动控制器的位置被保持。
When the foot pedal is in a third position, the position of the work tool control is maintained and the position of the ground drive control is maintained.
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