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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However, the state of city tunnel operation management is vital important, city tunnel's safe operation has great effect on people's properties and social stabilization.

然而，城市隧道运行管理状况至关重要，它的安全运行是关系人民财产和社会稳定的大事。

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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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