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Had great time kicking off #NAAMC in Pittsburgh with a personal tour of NIOSH lab where they do a ton of work on mine safety and respiratory dust protection. This apparatus is designed to create a clean air curtain around workers in high Quartz-content dust generation activities. 
This is a $50K dust vacuum closet designed to remove dust from workers clothes to avoid clothing-derived dust exposure post-shift.
This is a full scale mock up of this insane typewriter-like machine that shaves away the mining walls while also holding the ceiling up to prevent it from collapsing.
