MIL-G-23827B
作者:标准资料网 时间:2024-05-03 01:27:09 浏览:8807
来源:标准资料网
MIL-G-23827B, MILITARY SPECIFICATION: PERFORMANCE SPECIFICATION, GREASE, AIRCRAFT AND INSTRUMENT, GEAR AND ACTUATOR SCREW (30 JUN 1983) [S/S BY MIL-PRF-23827C]., This specification covers the requirements for one grade of grease for use at extremely low temperatures on aircraft and instruments. This grease is effective in the temperature range from -73 degrees to 121 degrees C. The type I grease is identified by NATO code Number G-354 (see 6.8).
【英文标准名称】:Acoustics-Determinationofsoundpowerlevelsofnoisesources-Engineeringmethodsforsmall,movablesourcesinreverberantfields-Comparisonmethodforhard-walledtestrooms
【原文标准名称】:声学.噪声源声功率级的测定.混响声场中小型可移动声源的工程法.硬壁试验室中的比较法
【标准号】:BSENISO3743-1-2009
【标准状态】:作废
【国别】:英国
【发布日期】:2010-04-30
【实施或试行日期】:2010-04-30
【发布单位】:英国标准学会(GB-BSI)
【起草单位】:BSI
【标准类型】:()
【标准水平】:()
【中文主题词】:
【英文主题词】:Acousticmeasurement;Acousticpropertiesandphenomena;Acoustictesting;Acoustictestingrooms;Acousticalreverberation;Acoustics;Audiofrequencies;Calibration;Closedtestrooms;Comparisonanalysis;Comparisonmethods;Comparisonsoundsources;Definitions;Determination;Externalnoise;Handling;Humidity;Information;Installations;Machines;Measurement;Measuringinstruments;Measuringtechniques;Microphones;Noise;Noise(environmental);Noisemeasurements;Noisesources;Operation;Precision;Sonictesting;Sound;Soundintensity;Soundlevel;Soundlevels;Soundproofing;Soundradiation;Soundsources;Specification(approval);Temperature;Testing;Testingconditions;Walls
【摘要】:ThispartofISO3743specifiesarelativelysimpleengineeringmethodfordeterminingthesoundpowerlevelsofsmall,movablenoisesources.Themeasurementsarecarriedoutwhenthesourceisinstalledinahard-walledtestroom.Acomparisonmethodisusedtodeterminetotheoctave-bandsoundpowerlevelsofthesource.Thespatialaverage(octave-band)soundpressurelevelsproducedbythesourceundertestarecomparedtothespatialaverage(octave-band)soundpressurelevelsproducedbyareferencesoundsourceofknownsoundpoweroutput.Thedifferenceinsoundpressurelevelsisequaltothedifferenceinsoundpowerlevelsifconditionsarethesameforbothsetsofmeasurements.TheA-weightedsoundpowerlevelisthencalculatedfromtheoctave-bandsoundpowerlevels.
【中国标准分类号】:Z32
【国际标准分类号】:17_140_01
【页数】:22P.;A4
【正文语种】:英语
【英文标准名称】:PreparationofTestSpecimensofAsphalt-StabilizedSoils
【原文标准名称】:沥青固定土壤的试样的制备
【标准号】:ASTMD4223-1983
【标准状态】:作废
【国别】:美国
【发布日期】:1983
【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】:准备;施工材料;建筑;工艺;土壤;地沥青;试样
【英文主题词】:soils;constructionmaterials;testspecimens;construction;asphalts;preparation;processes
【摘要】:
【中国标准分类号】:P20
【国际标准分类号】:93_020
【页数】:4P;A4
【正文语种】:英语
