Area not classified as zone20 in which combustible dust, as a cloud, is likely to occur during normal operation, in sufficient quantities to be capable of producing an explosive concentration of combustible dust in mixture with air.
英
美
释义
在正常运行过程中,可能出现粉尘数量足以形成可燃性粉尘与空气混合物但未划入20区的场所。
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