ASTM D1981-2011 脂肪酸加热色变测定的标准试验方法

上一篇: ASTM D1331-2011 表面活性剂溶液的表面张力与界面张力的标准试验方法
下一篇: ASTM D1067-2011 测定水酸碱性的标准测试方法

【英文标准名称】:Air-EntrainingAdmixturesforConcrete
【原文标准名称】:混凝土用加气混合物
【标准号】:ASTMC260-1995
【标准状态】:作废
【国别】:美国
【发布日期】:1995
【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】:集料;施工材料;混凝土;建筑;多孔混凝土
【英文主题词】:cellularconcrete;aggregates;constructionmaterials;construction;concretes
【摘要】:
【中国标准分类号】:Q13
【国际标准分类号】:91_100_30
【页数】:
【正文语种】:英语


Product Code:SAE ARP988
Title:Electrohydraulic Mechanical Feedback Servoactuators
Issuing Committee:A-6b1 Hydraulic Servo Actuation Committee
Scope:The recommendations contained herein are confined to the input and output characteristics of electrohydraulic mechanical feedback servoactuators. The information presented should be useful for standardizing the terminology and for specification of physical and performance parameters.The recommendations do not restrict nor attempt to define the internal design characteristics of servoactuators. As such, the material is equally applicable to servoactuators having different internal functioning, different ratings, different physical size, etc. In certain instances, standards for actuator design are recommended to increase interchangeability as, for example, pigtail color-coding and actuator polarity.The specifications contained herein should be adequate to describe electrohydraulic mechanical feedback servoactuators used for position control. Additional specifications may be necessary to define special requirements for specific control systems. Certain dynamic compensation methods will be discussed.