Practices have proved that effective gas extraction can improve ventilation management, gas control and reliability of work safety in the mine.

实践证明，通过对矿井瓦斯的有效抽采，可以使矿井的通风管理、瓦斯治理工作稳步提高，矿井安全可靠度增强。

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Mr Paolucci said plans to improve the ventilation and counter the threat from humidity in the Chapel would be unveiled soon.

BBC: Sistine Chapel ceiling at 500: The Vatican's dilemma

In the meantime, you can improve the ventilation at your seat by turning on the overhead air vent to low and positioning the airflow to be slightly in front of your face.

CNN: Commentary: Flu and your health on a plane