基于GTO器件特性和故障状态下gto的过流工况，研究了GTO过流分级快速保护模式和实现方法以及保护的极限条件。

GTO over current rapid protection by gradation mode and limited protection conditions are studied based on the features of GTO and over current situation under fault state.

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对深孔钻屑组合机床分级进给机构进行改进后，达到了简化结构、方便调整、减少故障的目的。

After the modification of step feed mechanism of deep drill combined machine tool, simplifying structure, convenient adjustment and reducing fault rate have been proved.

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完成对网络设备告警的实时处理，包括告警排队、告警分级、告警定位、声音告警提示、告警入库或存文件等基本的故障管理。

Real-time alarms handling, including the queuing, classifying and locating of alarms, sound alarm and saving alarms in database or files.

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