空气含量 meaning in English

air content
air entrainment

Testing fresh concrete - air content - pressure methods
新浇混凝土试验.空气含量.压力法
Testing fresh concrete - part 7 : air content - pressure methods
新鲜混凝土试验.第7部分:空气含量.压力法
Standard test method for air content of hydraulic cement mortar
水硬性水泥用灰浆的空气含量的标准试验方法
Method of test for air content of fresh concrete by pressure method
用压力法测定新浇混凝土空气含量的试验方法
Standard test method for unit weight , yield , and air content gravimetric of concrete
混凝土的单位重量分析屈服点及空气含量测定

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