本文介绍了医用直线加速器射频源老化故障的诊断方法，并提供了三种应急措施。
This article introduces how to diagnose the ageing of medical lineal accelerator RF driver, and supply three emergency solutions.
燃气热水器漏水是常见的故障，热水器使用过程中，若不注意清洗保养或元件老化都会出现热水器漏水情况。
Leakage of gas water heater is a common fault, the use of water heater, if you do not pay attention to cleaning and maintenance or component aging will appear water heater leakage.
设计缺陷和液压系统元件的老化是导致龙门铣床出现故障的主要原因。
Design defects and hydraulic system elements aging are the main causes of the gantry milling machine's fault.
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