| http://www.w3.org/ns/prov#value | - The invention will now be described with reference to the drawings, of which: I Fig. 1 is an elevation partly in section of dust removal apparatus constructed for the practice of the invention, showing the same installed in the slope of a mine; Fig. 2 is a sectional elevation of a detail of the enclosure or hood over the mouth of the hole being drilled by the pneumatic drill of Fig. 1; Fig. 3 is a
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