The protection switch prevents this.

保护开关可防止这种情况。

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Equipped with safety protection switch.

装有安全保护开关。

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Over-load protection: self-equipped with heat protection switch. Fan stops work when over loaded.

过载保护：自带热敏保护开关，过载后自动停机；

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Not according to a new econometric study that concludes no more than 20% of existing coal generation is likely to switch over to gas, even if the Environmental Protection Agency drives up the cost of coal generation and gas prices stay at their current, low rates indefinitely.

FORBES: Frack Gas Not Likely To Displace King Coal, Study Suggests

In order to guard against the generics, Forest is trying to switch patients from Celexa to Lexapro, which still has years of patent protection.

FORBES: Magazine Article

That leads to another potential upside for Merck: It could switch patients from Zocor to a Zocor-Zetia combination pill before Zocor loses patent protection in 2006.

FORBES: Merck And Schering-Plough's Zetia OK'd