alertor

1.If the operator is either inattentive or napping, the alertor sounds an alarm.

如操作人员精神不集中或打盹儿，本装置声报警。

2.A device to watch the operator who watches the machine.If the operator is either inattentive or napping, the alertor sounds an alarm.

一种对机器作情况操作人员进行装置。如操作人员精神不集中或打盹儿，本装置声报警。