The blast was traced to combustible dust that had collected in a 「polishing workshop」 duct in a recently completed factory complex in Chengdu, the capital of Sichuan province.
With the development of science and technology, the special case where explosive gas and combustible dust present simultaneous is emerged more and more.
随着科技的深入发展,爆炸性气体及爆炸性粉尘并存场所中的防爆问题日益凸现出来。
These zones establish the differences in the periods of occurrence of a cloud of combustible dust in the air during normal operations.