The utility model has the advantages that the installation is simple, the work efficiency is enhanced effectively, and simultaneously the security of the operator is further guaranteed.

本实用新型安装简单，有效提高工作效率，同时也进一步保障了操作人员的安全。

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The utility model provides a door and window automatic operator to solve the problem that a door or a window can not be closed when no man is at home in a rainy day.

本实用新型提供一种门窗自动开关装置，以解决下雨天人不在时无法对门 窗进行关闭的问题。

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An operator can see welding spots clearly no matter when stars or stops welding by adopting the utility model.

采用该防护面罩，无论是停焊或是起焊时，都能看清焊点。

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Exelon, a utility name that is the largest operator of nuclear plants in the U.S., felt the sting too.

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It took Schaeffer only five months to analyze the setup and write code that would let him, from his laptop, tell the Scada system to open and close enough breakers to bring down the mock utility--without letting the legitimate operator see what was going on.

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Investors in the so-called public-private partnership include Russian Railways, national power utility Unified Energy System and state-controlled pipeline operator Transneft.

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