This is contrary (or in comparison) to the catastrophic failures that have been documented for air or oil circuit breakers.
这与被提供了为空气或油开关的灾难性故障是相反的（或在比较） 。
For example, oil and air circuit breakers are now replaced by gas ones.
例如，油和空气断路器如今已被气体断路器取代。
The sounder circuit is used to adjust oil-minimum breakers, so that the working efficiency can be raised and the labour intensity can be reduce.
设计一个少油断路器调整用音响信号电路，以便提高调整工作的效率，并减轻劳动强度。
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