仪表设上、下限二位开关型接点装置，在压力达到设定值时发出信号或通断控制电路，供作业系统自动控制或发讯用。
Instruments based on the lower limit of two switch-contact device, the pressure to set a signal or when the value of on-off control circuit for the operating system's automatic control or the use.
当所述脚踏开关在第二位置时，所述作业工具控制器的位置被保持而所述地面驱动控制器不受影响。
When the foot pedal is in a second position, the position of the work tool control is maintained, while the ground drive control is not affected.
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.
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