The primary power supply is powered from the mains supply and energizes a lumped coil; the current ranges anywhere from 5 to125 amps.

主要的电力供给是来自市电电源并通过一个集合线圈激发；电流范围从5到125安培。

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In areas where there are water scarcity issues, if we can take our factories off the mains supply, then that means there is more water available for the local community.

在水资源匮乏的地区，如果我们的工厂可以不再依赖供水管道，那么当地社区获得的供应就会更多。

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The utility model provides a wind-solar hybrid balcony generating power supply which does not use the mains supply but solar energy and wind energy.

本实用新型提出一种不用市电而用太阳能和风能的风光互补阳台发电电源。

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The NEA wants government help to get more communities connected to the mains supply to cut fuel poverty.

BBC: Rural struggle without mains gas

We have had no mains supply for over 48 hours.

BBC: Water chaos affects thousands in Northern Ireland

In the 70s when I was away from a mains electricity supply, a 12-volt battery would keep my respirator operating for just 20 minutes.

CNN: 'I lived in an iron lung for seven years'