This is safeguarded by a safety door and a safety switching contact.

这一点的安保是由安全门和安全开关触头来实现的。

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The contact potential or thermoelectric offset voltage is the key specification of a switch card designed for low voltage switching.

接触电势或热电效应偏移电压是设计用于低压切换的开关卡的关键技术指标。

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Contact life is much longer when cold switching is used.

当采用冷切换时，触点的寿命要长许多。

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E-mails, text messages, photographs and other files relating to a particular person can all be accessed quickly through the phone's contact list, without switching laboriously from one application to another.

ECONOMIST: Face value