For the dangerous sites with explosive dust mixture: 11 division.
爆炸性粉尘混合物危险场所：11区。
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。
The term dust cloud describes dust particles that along with air form a potentially explosive mixture.
该术语描述与空气尘埃粒子，形成了潜在的爆炸性混合物的尘埃云。
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