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ASTM C 55-2006 混凝土建筑物砖的标准规范

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【英文标准名称】:StandardSpecificationforConcreteBuildingBrick
【原文标准名称】:混凝土建筑物砖的标准规范
【标准号】:ASTMC55-2006
【标准状态】:现行
【国别】:美国
【发布日期】:2006
【实施或试行日期】:
【发布单位】:美国材料与试验协会(ASTM)
【起草单位】:ASTM
【标准类型】:()
【标准水平】:()
【中文主题词】:砌块;砖;耐化学腐蚀材料;混凝土;建筑;施工材料;规范(验收)
【英文主题词】:Blocks(building);Bricks;Chemical-resistantmaterials;Concretes;Construction;Constructionmaterials;Specification(approval)
【摘要】:
【中国标准分类号】:Q14
【国际标准分类号】:91_100_30
【页数】:3P;A4
【正文语种】:英语


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Product Code:SAE AIR1751
Title:Prediction Method of Lateral Attenuation of Airplane Noise During Takeoff and Landing
Issuing Committee:A-21 Aircraft Noise Measure Noise Aviation Emission Modeling
Scope: The SAE A-21 Committee on Aircraft Noise undertook in 1979 the development of a uniform and consistent method for the prediction of lateral attenuation. The project was divided into two phases: (1) A short-term phase in which correlations of flight data were made using frequency-weighted and time-integrated measures of the noise, such as Effective Perceived Noise Level (EPNL) and Sound Exposure Level (SEL), see Appendix A; and (2) A long-term phase in which the effects of various sound-propagation phenomena would include ground reflection effects, refraction effects, and airplane shielding effects, as well as other ground and engine/airplane installation effects. This Aerospace Information Report is directed to the short-term phase in order to produce an interim prediction method as soon as possible.
基本信息
标准名称：鳞齿支承帽
中标分类： 机械 >> 工艺装备 >> 组合卡具
发布日期：
实施日期：2000-12-01
首发日期：
作废日期：
出版日期：
页数：1页
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所属分类： 机械 工艺装备 组合卡具