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爆炸性气体混合物危险场所：2区。
For the dangerous sites with explosive air mixture: 2 division.
youdao
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爆炸性粉尘混合物危险场所：11区。
For the dangerous sites with explosive dust mixture: 11 division.
youdao
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爆炸性粉尘混合物危险场所：11区。
For the dangerous sites with explosive dust mixture: 11 division.
youdao