Air pollution contributes to respiratory diseases.
空气污染可促使呼吸系统疾病发生。
Formaldehyde is a well known toxic air impurity affecting the upper respiratory tract.
甲醛是一种众所周知的有毒空气杂质影响上呼吸道。
The respiratory system consists of the lungs and the many air tracts of different sizes.
呼吸系统由肺及各大小不同的气管组成。
Standard on Breathing Air Quality for Fire and Emergency Services Respiratory Protection.
消防救生索及配件系列。
Curative and Effect Observation of posting Saccule in Air Duct treat for Respiratory Tract Hempotysis
气道内球囊置入术治疗呼吸道大咯血的疗效观察
Head continuous with body; Study on the Air Flow Rate of a Positive Pressure Respiratory Protective Hood
一种正压呼吸防护头罩送风量的研究
Study on NO level in exhaled air as a marker of the respiratory truct inflammation in patients with asthma
口呼一氧化氮对评估哮喘气道炎症的价值
Diphtheria and whooping cough are transmitted through the air from respiratory secretions of infected patients.
百喉及百日咳可由患者呼吸道分泌物通过空气传播。
Objective To study and determine the appropriate air flow rate of a positive pressure respiratory protective hood.
目的研究并确定一种正压呼吸防护头罩合适的送风量。
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