What is a peak expiratory flow rate test? The peak expiratory flow rate (PEFR) test measures how fast a person can exhale. The PEFR test is also called peak flow. This test is commonly performed at ...
Anthony Rowett Jr. explains how to select the proper diameter hose and nozzle size, based on fire flow formulas, for initial fire attack. Several factors need to be considered when deploying the ...
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