Previously the air division of the US Army. 原来美国的陆军航空分(AD)部。
When the first air division cone is moved into burner with angle keeping 20 °, circumfluence can come back to the original state without abrasion. 本文取消中心扩口后,提出了将燃烧器的一次风扩口内置,保持扩口的角度为20°,可保持燃烧器的回流区达到未磨损时的状态。
Future changes of air temperature division in China under global warming 全球变暖情景下中国气温分区的未来变化
B : Pan American Airlines. Flight 282. Air Services Division [ Civil Aviation Department ] 乙:泛美航空公司,282航班。航班事务部〔民航处〕
Research on air pollution division of Xiamen Special Economic Zone 厦门经济特区大气污染区划研究