MIL-HDBK-7B

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MIL-HDBK-7B, MILITARY HANDBOOK: LUMBER AND ALLIED PRODUCTS (6 AUG 1982)., lumber and wood products normally procured in considerable quantity for Department of Defense installations. Engineers are particular directed to the chapters dealing with strength of wood, preservative treatment, and moisture c o n t e n t . The chapters dealing with storage handling, tallying, inspection, grading, and sizes were written with the problems of inspectors, stock handlers, and supply clerks in mind. All of these chapters prove useful to the requisition writer by providing references useful in determining which species, q u a l i t i e s , and sizes of lumber, plywood, poles, railroad ties, and other wood products are usable for a given end use. This handbook also provides ready reference to the physical and mechanical properties of lumber products and the conditions of use that require special treatment with preservatives, fire r e t a r d a n t s , or special surfacing and machining. It is the primary purpose of this handbook to provide the kind of background information needed in making necessary decisions on all such problems. This type of information is not readily available elsewhere in a form directly related to supply problems involving lumber and allied products. To the extent that this handbook achieves its primary purpose, it is believed that important economies can be effected, greater assurance secured that the needed species, q u a l i t i e s , q u a n t i t i e s , and sizes will be received, and requisitioning procedures f a c i l i t a t e d . The handbook also has as part of its purpose to provide information on the handling, storage, and use of wood products to the end that better service will be obtained at less cost. The large quantities of wood products normally required by the various branches of the Department of Defense make economy of use just as essential as economical procurement; failure in the one can quickly offset any gains realized through success in the other. Moreover, proper handling, storage, and use are essential in the interest of conservation of the forest resources.

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【英文标准名称】:TransmissionandMultiplexing(TM)-DigitalRadioRelaySystems(DRRS)-Sub-STM-1DRRSoperatinginthe13GHz,15GHzand18GHzfrequencybandswithabout14MHzco-polarchannelspacing(EndorsementoftheEnglishversionETS300786:1998asGermanst
【原文标准名称】:传输与多路转换(TM).数字射频转接系统.带有约14MHz共极轨道空间的13GHz,15GHz,18GHz波段中Sub-STM-1DRRS系统操作
【标准号】:DINETS300786-1999
【标准状态】:作废
【国别】:德国
【发布日期】:1999-12
【实施或试行日期】:
【发布单位】:德国标准化学会(DIN)
【起草单位】:
【标准类型】:()
【标准水平】:()
【中文主题词】:数字射电连接;多路转换;射电转接站;无线电工程;数字的;数字信号;电信;电信;无线电电路;无线电信号;复接;传输技术;频带;无线电中继系统
【英文主题词】:transmissiontechnique;radio-relaysystems;multiplex;digitalradiolinks;radiocircuits;telecommunications;bandoffrequencies;radiosignals;multiplexing;digital;radioengineering;radiorelaystation;
【摘要】:
【中国标准分类号】:M35
【国际标准分类号】:33_060_30
【页数】:1P;A4
【正文语种】:德语


【英文标准名称】:Electricalapparatusforexplosivegasatmospheres-Increasedsafety"e"
【原文标准名称】:爆炸性气体环境用电气设备.增安型"e"
【标准号】:BSEN60079-7-2003
【标准状态】:作废
【国别】:英国
【发布日期】:2003-09-18
【实施或试行日期】:2003-09-18
【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】:安全;设备安全;安全要求;规范(验收);荧光灯;安全工程;定义;电驱动装置;试验;尘埃;爆炸安全性;预防爆炸;电气工程;可燃性环境;电气器具;蓄电池组;危险区域;爆炸危险;防爆;保护形式;爆炸;爆炸性环境;e型防护电气设备
【英文主题词】:Batteries;Burninggases;Combustible;Constructiontyperequirements;Dangerzones;Definition;Definitions;Degreesofprotection;Design;Documentations;Dust;Electricappliances;Electricalengineering;Electricalequipment;Electricalinstallations;Electrically-operateddevices;Equipment;Equipmentsafety;Explosionarea;Explosionhazard;Explosionproofness;Explosionprotection;Explosionsecurity;Explosion-proof;Explosions;Explosive;Explosiveatmospheres;Explosives;Flammableatmospheres;Flammablematerials;Fluorescentlamps;Gasatmosphere;Gases;Hazardousareasclassification(forelectricalequipment);Potentiallyexplosivematerials;Protectedelectricalequipment;Protectivemeasures;Ratedvoltages;Safety;Safetyengineering;Safetyrequirements;Specification(approval);Testing;Typeeprotectedelectricalequipment;Typeofprotection
【摘要】:ThispartofIEC60079specifiestherequirementsforthedesign,construction,testingandmarkingofelectricalapparatuswithtypeofprotectionincreasedsafety"e"intendedforuseinexplosivegasatmospheres.Thisstandardappliestoelectricalapparatuswitharatedvalueofsupplyvoltagenotexceeding11kVr.m.s.a.c.ord.c.Additionalmeasuresareappliedtoensurethattheapparatusdoesnotproducearcs,sparks,orexcessivetemperaturesinnormaloperationorunderspecifiedabnormalconditions.ThesespecificrequirementsareadditionaltothegeneralrequirementsinIEC60079-0thatapplytotypeofprotectionincreasedsafety"e"unlessspecificallyexcluded.
【中国标准分类号】:K35
【国际标准分类号】:29_260_20
【页数】:72P.;A4
【正文语种】:英语