工具脱离工件时，下防护装置必须自动回到覆盖位置。
The lower guard must automatically return to the covering position when the tool is withdrawn from the work.
介绍一种能自动记录、存档和打印检验报告，并具有很宽的检验范围的计算机、人工双控的新型劳动防护用品绝缘检验装置。
This paper introduces a new type of insulation testing device for labor protection, which has such functions as keeping records and archive, and automatically printing the testing report.
由控制管线操纵的大多数装置都在故障自动防护的基础上工作。
Most systems operated by control line operate on a fail-safe basis.
瓦斯加热，使用中因没瓦斯或其化因素未点燃时，自动警示与关闭瓦斯、安全防护装置。
Gas heating: Without gas or not burned for other reasons in use, it will alarm and turn off the gas automatically. Safety protection device.
瓦斯加热，使用中因没瓦斯或其化因素未点燃时，自动警示与关闭瓦斯、安全防护装置。
Gas heating: Without gas or not burned for other reasons in use, it will alarm and turn off the gas automatically. Safety protection device.
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