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The application of precise positioning vibration expectoration in airway clearance of patients with acute exacerbation of chronic obstructive pulmonary disease
MA Furong, SI Meimei, ZHU Yanfei
Tianjin Journal of Nursing . 2025, (6): 647 -650 .  DOI: 10.3969/j.issn.1006-9143.2025.06.004

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