The main insecure natural factors include: water, fire, gas, coal dust, wall collapse and so on. All of these are threatening the production safety of colliery enterprise.

其存在的主要不安全自然因素包括：水、火、瓦斯、矿尘、冒顶等，这些时时刻刻都在威胁着矿山企业的安全生产。

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When the dust settled on Wall Street, the Dow Jones industrials were down 3.0%, or 304.17 points, at 10.021.21.

FORBES: Market Scan

Opposite was just a wall of dust.

BBC: New Zealand earthquake aftermath: Your stories

Is it just due to the pixie dust being puffed out by Wall Street and the Fed, about to be blown away by the gathering storm others see coming.

FORBES: Consumers And Investors Blissfully Ignorant Of Economic Reality