【英文标准名称】:Earth-movingmachinery;operator'sfieldofview;part3:criteria
【原文标准名称】:土方机械司机的视野第3部分:判据
【标准号】:ISO5006-3-1993
【标准状态】:作废
【国别】:国际
【发布日期】:1993-06
【实施或试行日期】:
【发布单位】:国际标准化组织(ISO)
【起草单位】:ISO/TC127
【标准类型】:()
【标准水平】:()
【中文主题词】:能见度;操作;规范;视野;司机(汽车);操作者(人员);规范(认可);土方机械
【英文主题词】:Drivers(vehicles);Earth-movingequipment;Fieldofvision;Operation;Operators(personnel);Specification(approval);Specifications;Visibility
【摘要】:Specifiesvisibilityacceptancecriteriaforearth-movingmachinery;appliestoearth-movingmachinerywhichhasaspecificoperator'sstation.
【中国标准分类号】:P97
【国际标准分类号】:53_100
【页数】:2P;A4
【正文语种】:英语
【英文标准名称】:StandardPracticeforSamplingPhytoplanktonwithConicalTowNets
【原文标准名称】:用圆锥拖网取样可繁殖海洋浮游生物的标准实施规程
【标准号】:ASTMD4132-1982(2004)
【标准状态】:现行
【国别】:
【发布日期】:1982
【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】:E47.01
【标准类型】:(Practice)
【标准水平】:()
【中文主题词】:资源取回;浮游生物;抽样方法;渔网;污染控制;水质
【英文主题词】:
【摘要】:Theadvantagesofconicaltownetsareasfollows:3.1.1Theyarerelativelyinexpensive,easytoconstruct,andhighlyversatileinavarietyofsurfacewaters.3.1.2Theycanbeusedfromasmallpoweredboatwithaminimumofauxiliaryequipment.3.1.3Theyprovideasimplemeansbywhichtocollectqualitativesamplesofmacro-andmicro-plankton.3.1.4Theycanbeadaptedwithaflowmetertocollectsemiquantitativesamplesofmacro-andmicro-plankton.Thedisadvantagesofconicaltownetsareasfollows:3.2.1Theyareeffectiveonlywheredrawnthroughastratumofwaterhavingconsiderablethickness.Theyarenotsuitableforcollectingsamplesfromasmallorrestrictedregion.3.2.2Theyarenotsuitableforcollectionsinveryshallowwater.3.2.3Theycollectonlyqualitativesamples,orsemiquantitativesampleswhenusedwithaflowmeter.3.2.4Cloggingofthenetbyextraneousmaterials,suchasfloatingvascularplantsordebriscancauseerroneousresults.3.2.5Ifdiscretedepthsaresampledusingahorizontaltow,thesamplecanbecontaminatedwithorganismsfromotherdepthsduringthedeploymentandretrievalofthesamples.Thereareseveralspecialconsiderationsthatshallbeobservedwhenusingconicaltownets.Theyareasfollows:3.3.1Theconicalnetsamplersaredesignedtobetowedatspeedslessthan3knots;however,greaterspeedshavebeenusedforthelargernetswithaconcomitantincreaseincapture.3.3.2Althoughthereisatendencytousethesmallestmeshsizeavailable,thereistheliabilityofsmallmeshsizesreducingthecollectionefficiencyandincreasingequipmentfailurethroughtearing.3.3.3Ifdiscretedepthsamplesarerequired,anopeningandclosingnetdeviceshouldbeinstalledonthesampler.3.3.4Thenetsshouldbewashedfrequentlyandinspectedforpin-sizeholes,tears,netdeterioration,andotheranomalies.3.3.5Followinguse,wetnetsshouldbesuspendedfulllengthinairandinsubduedlightandallowedtodry.1.1Thispracticecoverstheproceduresforobtainingqualitativesamplesofaphytoplanktoncommunitybyuseofconicaltownets.Netswillnotretainallphytoplanktontaxa;forexample,nannoplanktonandultraplanktongenerallywillpassthroughanet.1.1Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:Z16
【国际标准分类号】:
【页数】:2P.;A4
【正文语种】:
基本信息
| 标准名称： | 控制电路电器和开关件的一般要求 |
| 中标分类： |
电工 >>
低压电器 >>
低压电器综合 |
| 发布日期： | |
| 实施日期： | 1993-03-01 |
| 首发日期： | |
| 作废日期： | |
| 出版日期： | |
| 页数： | 58页 |
适用范围
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前言
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目录
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引用标准
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所属分类： 电工 低压电器 低压电器综合