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X-Laser USA on Twitter: "#WednesdayWisdom Laser beams must be 3 meters (~10 feet) above the floor where an audience can stand, for safe and legal shows. Any laser safety questions? Just ask
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Figure 3-11, [HOW TO USE YOUR PEAK FLOW METER]. - Expert Panel Report 3: Guidelines for the Diagnosis and Management of Asthma - NCBI Bookshelf
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