Computer operation when placing the mouse position is too high, ShiShouWan in operation will back QuCheng a bad Angle, and keep the nervous state, can also cause carpal tunnel tissue hyperplasia.

操作电脑时将鼠标放置的位置过高，使手腕在操作中需背屈成一个难受的角度，并保持紧张状态，也会引起腕管组织增生。

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Abstract: in order to ensure highway tunnel safety and operation in clear and maintaining a certain level of service, the traffic engineering design and perfect must give enough attention.

摘要：为了确保公路隧道内行车安全、运营畅通和维持一定的服务水平，交通工程的设计与完善必须给予足够的重视。

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Through the study of correlative case of domestic and overseas tunnel operation management, the paper gains use for reference and revelation for the work of domestic city tunnel operation management.

论文通过国内外隧道运行管理相关案例的研究，获得了对我国的城市隧道运行管理工作的借鉴和启示。

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"At King's Cross station there is a rescue operation in the tunnel down on the line, " he said.

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These workers carry out specialised tasks on our tunnel-boring operation and travel around the world as employees of the Italian company that is doing the work.

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"Immediate checks revealed that the augering operation was associated with construction activity on land about 13 metres (42ft) above the top of the tunnel, " it added.

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