无燃烧与爆炸危险的环境中。

The working situation have no explosive danger and fire.

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燃烧与爆炸都是化学反应，必须具备纤维粉尘达到一定浓度、遇到一定点燃能量、在空气中有一定含氧浓度（％）这三个条件。

Both inflammation and explosion are chemical reactions, for which three prerequisites are required, i. e. certain fibre dust density, certain ignition energy andcertain oxygen density(%);

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能燃烧，蒸气与空气形成爆炸性混合物，爆炸极限7% - 73%(体积)。

Can burn, vapor and air to form an explosive mixture, the explosion limit of 7%-73% (volume).

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