Flammable gas found in the relay indicates some internal fault such as overheating or arcing, whereas air found in the relay may only indicate low oil level or a leak.

如果在继电器中发现可燃气体，这说明有内部故障，比如过热或者电弧作用；而继电器内的空气只说明油位低或者有漏油。

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Using the company's UAS battle-management software, airborne operators issued NATO-standard sensor and air-vehicle commands via a UHF satellite communication link and ground-station relay.

采用波音公司无人机战斗管理软件，机载操作人员通过特高频卫星通信链路和地面站中继发布北约标准传感器和飞行器命令。

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Use relays, contactor, button, air switch and travel switch etc low-voltage constitute control circuit called relay contact control circuit.

使用继电器、接触器、按钮、空气开关、行程开关等低压电器构成的控制电路称为继电接触控制电路。

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So Ted Stevens may have saved my life and that was something a great many Alaskans could say as they looked about at the roads and bridges, the hospitals and flood-control systems, the satellite weather and global-positioning relay stations, the sprawling Army and Air Force bases, the rural landing strips and postal air-cargo flights that sustain existence in Alaska as it enters its fiftieth year of statehood.

NEWYORKER: The State of Sarah Palin