The results showed that the integrality of the coal pillar would be one of the main reasons to cause the ventilation leakage and the left coal spontaneous combustion.
结果表明：煤柱完整性是导致采空区漏风、遗煤自燃的主要原因之一。
Retrograde ventilation is used for Wangjiazhai coal mine, both air leakage and ventilation resistance of the main shaft are largish.
王家寨煤矿为中央并列式通风，漏风量较大，主井通风阻力较大。
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。
Also look for any signs of mildew or mold, which may be associated with roof leakage or ventilation problems.
同样也要查看是否有霉菌或发潮的迹象，发霉发潮可能伴随着屋面渗漏或通风问题。
Good ability in ventilation, less leakage and anti-corrosion.
具有通风量大、泄漏量小、耐腐蚀等特点。
Before any inclement weather happens, building and facility managers can start by inspecting the elevator machine room's ventilation openings, Windows and doors for possible rain leakage.
在恶劣天气到来之前，物业以及设备管理人员可以先检查电梯机房设备通风口，门窗是否可能漏水。
On the basis of analyses and researches, this paper derives a method to measure the air leakage ratio within the last 100m ventilation pipe and the air volume to be provided by the ventilation fans.
并通过分析研究，推导出末段百米漏风率的测定方法，及其计算漏风量和风机供风量的公式。
On the basis of analyses and researches, this paper derives a method to measure the air leakage ratio within the last 100m ventilation pipe and the air volume to be provided by the ventilation fans.
并通过分析研究，推导出末段百米漏风率的测定方法，及其计算漏风量和风机供风量的公式。
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