This article has made statistic and analyses on many types of flameproof button and switches used in coalmine, such as travel switch, limit switch, pull switch, and so on.

就煤矿井下现用的隔爆按钮以及行程开关、限位开关、打点器、拉线开关、井口开关等进行了统计、分析，针对使用中出现的问题提出了改进措施。

youdao

As Lady Fate would have it, the company apparently outed a memo of the features on its French blog earlier today, but before it could yank the 'pull' switch, an eagle-eyed reader managed to grab the text and run it through -- surprise, surprise -- Google Translate.

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Reality extends to the plain fact that there is no switch or level to push, pull or toggle that will instantaneously change the polarity of the flow.

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Were I to pull an all-nighter, I could also switch Hue to blue to stay alert.

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