目的：探讨桂麻合方对哮喘豚鼠引喘潜伏期及肺组织病理变化的影响。
Objective: To investigate the effects of gui-ma compound on the latent period of inducing asthma and the pathological changes of lung tissue of guinea pig.
引气剂——使混凝土拌合物在拌和过程中引入空气而形成大量微小、封闭而稳定气泡的外加剂。
Air entraining agent can lead into air to produce lots of little and stable bubbles in the process of mixing concrete and other mixture.
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