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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If the switched current is too high, the resulting temperature increase and contact arcing will degrade the relay and shorten the contact life.

如果切换电流太高，造成的温度升高和接触电弧将会劣化继电器并缩短接触寿命。

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Each row is also coupled to each column through the relay contact leakage resistance and capacitance.

每行还通过继电器触点的漏泄电阻和电容耦合到每一列。

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They are the first point of contact for anyone who wants to relay their experiences to the inquiry.

BBC: Sir Anthony Hart

Unlike a smartphone, a watch is always in direct contact with the skin, which means it can relay a unique set of data on body functions.

FORBES: On Second Thought, Maybe That Apple iWatch Will Be A Timely Product After All