GB 8232-1987 粟(谷子)
作者:标准资料网 时间:2024-04-29 09:14:18 浏览:8121
来源:标准资料网
基本信息
标准名称: | 粟(谷子) |
英文名称: | Millet in husk |
中标分类: |
农业、林业 >>
粮食与饲料作物 >>
禾谷类作物与产品 |
ICS分类: |
食品技术 >>
谷物、豆类及其制品
|
替代情况: | 被GB/T 8232-2008代替 |
发布部门: | 国家技术监督局 |
发布日期: | 1987-10-08 |
实施日期: | 1988-04-01 |
首发日期: | 1987-10-08 |
作废日期: | 2009-01-20 |
主管部门: | 国家粮食局 |
归口单位: | 全国粮油标准化技术委员会 |
起草单位: | 辽宁省粮油检测所 |
出版社: | 中国标准出版社 |
出版日期: | 1988-04-01 |
页数: | 4页 |
适用范围
本标准适用于收购、销售、调拨、储存、加工和出口的商品粟。
前言
没有内容
目录
没有内容
引用标准
没有内容
所属分类: 农业 林业 粮食与饲料作物 禾谷类作物与产品 食品技术 谷物 豆类及其制品
【英文标准名称】:StandardTestMethodforAirflowResistanceofAcousticalMaterials
【原文标准名称】:吸音材料的气流阻力器的试验方法
【标准号】:ASTMC522-2003(2009)e1
【标准状态】:现行
【国别】:美国
【发布日期】:2003
【实施或试行日期】:
【发布单位】:美国材料与试验协会(US-ASTM)
【起草单位】:E33.01
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:
【英文主题词】:absorption;acousticalmaterials;airflowresistance;airflowresistivity;Absorption;Acousticaltests;Airflowperformance;Airflowresistance;Airflowresistivity;Soundtransmission--buildingmaterials/applications
【摘要】:Thespecificairflowresistanceofanacousticalmaterialisoneofthepropertiesthatdetermineitssound-absorptiveandsound-transmittingproperties.Measurementofspecificairflowresistanceisusefulduringproductdevelopment,forqualitycontrolduringmanufacture,andforspecificationpurposes.Validmeasurementsaremadeonlyintheregionoflaminarairflowwhere,asidefromrandommeasurementerrors,theairflowresistance(R=P/U)isconstant.Whentheairflowisturbulent,theapparentairflowresistanceincreaseswithanincreaseofvolumevelocityandthetermx201C;airflowresistancex201D;doesnotapply.ThespecificairflowresistancemeasuredbythistestmethodmaydifferfromthespecificresistancemeasuredbytheimpedancetubemethodinTestMethodE384fortworeasons.Inthepresenceofsound,theparticlevelocityinsideaporousmaterialisalternatingwhileinthistestmethod,thevelocityisconstantandinonedirectiononly.Also,theparticlevelocityinsideaporousmaterialisnotthesameasthelinearvelocitymeasuredoutsidethespecimen.1.1Thistestmethodcoversthemeasurementofairflowresistanceandtherelatedmeasurementsofspecificairflowresistanceandairflowresistivityofporousmaterialsthatcanbeusedfortheabsorptionandattenuationofsound.Materialscoverarangefromthickboardsorblanketstothinmats,fabrics,papers,andscreens.Whenthematerialisanisotropic,provisionismadeformeasurementsalongdifferentaxesofthespecimen.1.2Thistestmethodisdesignedforthemeasurementofvaluesofspecificairflowresistancerangingfrom100to10000mksrayls(Pax00B7;s/m)withlinearairflowvelocitiesrangingfrom0.5to50mm/sandpressuredifferencesacrossthespecimenrangingfrom0.1to250Pa.Theupperlimitofthisrangeoflinearairflowvelocitiesisapointatwhichtheairflowthroughmostporousmaterialsisinpartialorcompletetransitionfromlaminartoturbulentflow.1.3AprocedureforaccreditingalaboratoryforthepurposesofthistestmethodisgiveninAnnexA1.1.4ThevaluesstatedinSIunitsaretoberegardedasstandard.Nootherunitsofmeasurementareincludedinthisstandard.1.4.1Table1isprovidedforusertoconvertintocgsunits.1.5Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:Q25
【国际标准分类号】:91_120_20
【页数】:5P.;A4
【正文语种】:英语