The means of sealing by nitrogen aerating and local forced ventilation are used for the leakage source points so as to reduce the explosion class in the gas zones.

通过对煤气加压站煤气泄漏源点的分析和确认，并对其泄漏源点采取充氮密封和局部强制通风等手段，以达到降低煤气区域爆炸等级的目的，并对煤气加压站防爆等级进行了探讨性划分。

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Uncertainties in the occurrence of the leakage, the intensity of leakage source, and the diffusion model in the process of the risk assessment of urban gas leakage are discussed.

讨论了燃气泄漏事故风险评价中泄漏的发生、泄漏源强度、扩散模式的不确定性问题。

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While the source of water currently received by the Hubli-Dharwad Municipal Corporation is filtered, sewage leakage and the poor management of waste often contaminates drinking water on its way into the homes.

CNN: Students work to improve water quality in India