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Keywords: Validity
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Journal Articles
Journal of Engineering, Design and Technology (2018) 16 (6): 837–849.
Published: 23 October 2018
...Yumiao Chen; Zhongliang Yang Purpose Investigating the subjective breathing resistance of wearing respirators requires a valid and reliable technique to measure breathing resistance. The purpose of this study is to test the validity and reliability of several rating scales and select the best...

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