The electromagnetic interference and mechanical vibration are easy to cause false output of the PLC, thus resulting in trouble of the system.

电磁干扰、机械振动等因素易造成PLC误输出，引发系统故障。

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When that condition is false, that is, the page counter is either less than the start page or greater than the end page, it does not write any output.

当那个条件为假(也就是说，页计数器的值小于起始页或大于结束页)时，则selpg不再写任何输出。

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A false value for the ok variable triggers the script to output a VXML fragment that redirects the user to the addentry.vxml file that will ask the user to re-specify their appointment information.

ok变量的值为false将触发脚本输出一个vxml代码段，用于将用户重定向到addentry . vxml文件，该文件将要求用户重新指定其约会信息。

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But as manufacturing accounts for only about one-fifth of total output, the effect is to create the false impression that the whole economy is slowing down.

ECONOMIST: A monetary tug-of-war