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Hits 1181  Download times 1166  Received:October 16, 1997  
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DOI   10.11656/j.issn.1672-1519.1998.01.16
Key Words   
Author NameAffiliation
董泽 天津第一石油化工厂保健站 300380 
薛恩彬 天津西青医院呼吸病研究所 300380 
Abstract
    

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