Powdered material may form explosive dust-air mixture.

粉状材料可形成爆炸性粉尘空气混合物。

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For the dangerous sites with explosive dust mixture: 11 division.

爆炸性粉尘混合物危险场所：11区。

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Strict control of coal mines, metal and nonmetal mines, dangerous chemicals, fireworks, explosive dust and other high risk workplace operators.

严格控制煤矿、金属非金属矿山、危险化学品、烟花爆竹、涉爆粉尘等高风险作业场所操作人员数量。

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Or perhaps explosive pixie dust suddenly finds them whenever they head to the airport.

FORBES: Remember 9/11? TSA Finally Takes Off the Gloves, Reminds Critics of Reality.

Beside beefing up the rules to detect explosive methane or coal dust, the proposed law would make it a felony to avert safety standards and to give advance warnings that inspectors were on the premises.

FORBES: Federal Prosecutors Drilling Deep for Justice in Coal Mining Tragedy