We are working on the assumption that it was a gas explosion.
我们正依据它是一起燃气爆炸的假设而行动。
At the time of the explosion, 436 people were working underground.
当爆炸发生时，有436名矿工在井下工作。
It improves dust effect and working environment. It provides assure for explosion proof coal dust.
极大地改善工作面的灭尘效果，改善劳动环境，为防。
It improves dust effect and working environment. It provides assure for explosion proof coal dust.
极大地改善工作面的灭尘效果，改善劳动环境，为防。
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