【英文标准名称】:Determinationofflexuralstrengthoflightweightaggregateconcretewithopenstructure.
【原文标准名称】:敞形结构轻质集料混凝土的抗弯强度测定
【标准号】:NFP19-122-1996
【标准状态】:现行
【国别】:法国
【发布日期】:1996-12-01
【实施或试行日期】:1996-12-20
【发布单位】:法国标准化协会(AFNOR)
【起草单位】:
【标准类型】:()
【标准水平】:()
【中文主题词】:试样;尺寸;测定;规范(验收);建筑;负荷;混凝土;加气混凝土;气体干燥;试验;预制配件;孔隙率;元部件;预制的;材料强度;特性;轻质混凝土;弯曲拉伸强度;混凝土构件;集料;碎片;弯曲试验;抗拉强度
【英文主题词】:
【摘要】:
【中国标准分类号】:Q13
【国际标准分类号】:91_100_30
【页数】:11P;A4
【正文语种】:其他


Product Code:SAE AS4052
Title:Gland Design: Scraper, Landing Gear, Installation
Issuing Committee:A-5b Gears, Struts And Couplings Committee
Scope:This SAE Aerospace Standard (AS) covers an alternate gland design for the installation of scraper/wiper rings in the lower end of landing gear shock struts for the purpose of contaminant exclusion. The defined scraper gland covered by this document, as shown, is a variant of AS4716, the accepted gland standard for MS28775, O-ringn packing seals. Piston diameters, gland internal diameters, groove sidewall angles and the surface finish are all defined by AS4716, but the gland outer retaining wall diameter is changed. AS4088 is similar to this document, but was developed by SAE A-6 for flight control and general purpose cylinders. It differs from this document primarily by the clearance between the rod (piston) and outer gland wall. Since landing gears are more susceptible to dirt contamination, the additional clearance provides a larger path to allow excessive dirt accumulation to exit the gland.