If the weight of the load varies from lift to lift, you should record the average and maximum weights lifted.
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The adjustable nose clip secures the mask in place, and the duckbill shape will contour to a myriad of face sizes and shapes.
In addition to these intramural programs, NIOSH funds many extramural research projects.
They are more fitted and eliminate gaps thanks to their "duckbill" designs, adjustable nose clips, and sealed-like edges.
Although it is counter-intuitive that particle sizes of less than 0.