Abstract
Abstract Two significant developments concerning dust, respirators have occurred very recently in the United Kingdom. One development involves a half-mask facepiece with an inflated pneumatic face-sealing edge that fits human faces-as well as a conventional full facepiece. The other development concerns a dust respirator equipped with a compact, battery-operated air blower that pulls air through a dust filter and supplies the clean air to the facepiece at a slight positive pressure so that any leakage between the facepiece and the wearer's face is outward from the interior of the facepiece.
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