中英文翻译系统的分析与设计.doc中英文翻译系统的分析与设计.doc

收藏 分享

资源预览需要最新版本的Flash Player支持。
您尚未安装或版本过低,建议您

SYSTEMSANALYSISANDDESIGNWORKINGUNDERCONTROLOFASTOREDPROGRAM,ACOMPUTERPROCESSESDATAINTOINFORMATIONTHINKABOUTTHATDEFINITIONFORAMINUTEANYGIVENCOMPUTERAPPLICATIONINVOLVESATLEASTTHREECOMPONENTSHARDWARE,SOFTWARE,ANDDATAMERELYWRITINGAPROGRAMISNTENOUGH;BECAUSETHEPROGRAMISBUTONECOMPONENTINASYSTEMASYSTEMISAGROUPOFCOMPONENTSTHATWORKTOGETHERTOACCOMPLISHANOBJECTIVEFOREXAMPLE,CONSIDERAPAYROLLSYSTEMITSOBJECTIVEISPAYINGEMPLOYEESWHATCOMPONENTSAREINVOLVEDEACHDAY,EMPLOYEESRECORDTHEIRHOURSWORKEDONTIMECARDSATTHEENDOFEACHWEEK,THETIMECARDSARECOLLECTEDANDDELIVEREDTOTHECOMPUTERCENTER,WHERETHEYAREREADINTOAPAYROLLPROGRAMASITRUNS,THEPROGRAMACCESSESDATAFILESFINALLY,THEPAYCHECKSAREPRINTEDANDDISTRIBUTEDFORTHESYSTEMTOWORK,PEOPLE,PROCEDURES,INPUTANDOUTPUTMEDIA,FILES,HARDWARE,ANDSOFTWAREMUSTBECAREFULLYCOORDINATEDNOTETHATTHEPROGRAMISBUTONECOMPONENTINASYSTEMCOMPUTERBASEDSYSTEMSAREDEVELOPEDBECAUSEPEOPLENEEDINFORMATIONTHOSEPEOPLE,CALLEDUSERS,GENERALLYKNOWWHATISREQUIRED,BUTMAYLACKTHEEXPERTISETOOBTAINITTECHNICALPROFESSIONALS,SUCHASPROGRAMMERS,HAVETHEEXPERTISE,BUTMAYLACKTRAININGINTHEUSERSFIELDTOCOMPLICATEMATTERS,USERSANDPROGRAMMERSOFTENSEEMTOSPEAKDIFFERENTLANGUAGES,LEADINGTOCOMMUNICATIONPROBLEMSASYSTEMSANALYSTISAPROFESSIONALWHOTRANSLATESUSERNEEDSINTOTECHNICALTERMS,THUSSERVINGASABRIDGEBETWEENUSERSANDTECHNICALPROFESSIONALSLIKEANENGINEERORANARCHITECT,ASYSTEMSANALYSTSOLVESPROBLEMSBYCOMBININGSOLIDTECHNICALSKILLSWITHINSIGHT,IMAGINATION,ANDATOUCHOFARTGENERALLY,THEANALYSTFOLLOWSAWELLDEFINED,METHODICALPROCESSTHATINCLUDESATLEASTTHEFOLLOWINGSTEPS;1PROBLEMDEFINITION2ANALYSIS3DESIGN4IMPLEMENTATION5MAINTENANCEATTHEENDOFEACHSTEP,RESULTSAREDOCUMENTEDANDSHAREDWITHBOTHTHEUSERANDTHEPROGRAMMERSTHEIDEAISTOCATCHANDCORRECTERRORSANDMISUNDERSTANDINGSASEARLYASPOSSIBLEPERHAPSTHEBESTWAYTOILLUSTRATETHEPROCESSISTHROUGHEXAMPLEPICTUREASMALLCLOTHINGSTORETHATPURCHASESMERCHANDISEATWHOLESALE,DISPLAYSTHISSTOCK,ANDSELLSITTOCUSTOMERSATRETAILONTHEONEHAND,TOOMUCHSTOCKREPRESENTSANUNNECESSARYEXPENSEONTHEOTHERHAND,APOORSELECTIONDISCOURAGESSHOPPERSIDEALLY,ABALANCECANBEACHIEVEDENOUGH,BUTNOTTOOMUCHCOMPLICATINGMATTERSISTHEFACTTHATINVENTORYISCONSTANTLYCHANGING,WITHCUSTOMERPURCHASESDEPLETINGSTOCK,ANDRETURNSANDREORDERSADDINGTOIT1THEOWNERWOULDLIKETOTRACKINVENTORYLEVELSANDREORDERANDGIVENITEMJUSTBEFORETHESTORERUNSOUTFORASINGLEITEM,THETASKISEASYJUSTCOUNTTHESTOCKONHANDUNFORTUNATELY,THESTOREHASHUNDREDSOFDIFFERENTITEMS,ANDKEEPINGTRACKOFEACHONEISIMPRACTICALPERHAPSACOMPUTERMIGHTHELP21PROBLEMDEFINITIONTHEFIRSTSTEPINTHESYSTEMSANALYSISANDDESIGNPROCESSISPROBLEMDEFINITIONTHEANALYSTSOBJECTIVEISDETERMININGWHATTHEUSERINTHISCASE,THESTORESOWNERNEEDSNOTETHAT,ASTHEPROCESSBEGINS,THEUSERPOSSESSESTHECRITICALINFORMATION,ANDTHEANALYSTMUSTLISTENANDLEARNFEWUSERSARETECHNICALEXPERTSMOSTSEETHECOMPUTERASAMAGICBOX,ANDARENOTCONCERNEDWITHHOWITWORKSATTHISSTAGE,THEANALYSTHASNOBUSINESSEVENTHINKINGABOUTPROGRAMS,FILES,ANDCOMPUTERHARDWARE,BUTMUSTCOMMUNICATEWITHTHEUSERONHISORHEROWNTERMTHEIDEAISTOENSURETHATBOTHTHEUSERANDTHEANALYSTARETHINKINGABOUTTHESAMETHINGTHUS,ACLEAR,WRITTENSTATEMENTEXPRESSINGTHEANALYSTSUNDERSTANDINGOFTHEPROBLEMISESSENTIALTHEUSERSHOULDREVIEWANDCORRECTTHISWRITTENSTATEMENTTHETIMETOCATCHMISUNDERSTANDINGSANDOVERSIGHTSISNOW,BEFORETIME,MONEYANDEFFORTAREWASTEDOFTEN,FOLLOWINGAPRELIMINARYPROBLEMDEFINITION,THEANALYSTPERFORMSAFEASIBILITYSTUDYTHESTUDYABRIEFCAPSULEVERSIONOFTHEENTIRESYSTEMSANALYSISANDDESIGNPROCESS,ATTEMPTSTOANSWERTHREEQUESTIONS1CANTHEPROBLEMBESOLVED2CANITBESALVEDINTHEUSERSENVIRONMENT3CANITBESOLVEDATAREASONABLECOSTIFTHEANSWERTOANYONEOFTHESEQUESTIONSISNO,THESYSTEMSHOULDNOTBEDEVELOPEDGIVENAGOODPROBLEMDEFINITIONANDAPOSITIVEFEASIBILITYSTUDY,THEANALYSTCANTURNTOPLANNINGANDDEVELOPINGAPROBLEMSOLUTION22ANALYSISASANALYSISBEGINS,THEANALYSTUNDERSTANDSTHEPROBLEMTHENEXTSTEPISDETERMININGWHATMUSTBEDONETOSOLVEITTHEUSERKNOWSWHATMUSTBEDONE1DURINGANALYSIS;THISKNOWLEDGEISEXTRACTEDANDFORMALLYDOCUMENTEDMOSTUSERSTHINKINTERMSOFTHEFUNCTIONSTOBEPERFORMEDANDTHEDATAELEMENTSTOBEMANIPULATEDTHEOBJECTIVEISTOIDENTIFYANDLINKTHESEKEYFUNCTIONSANDDATAELEMENTS,YIELDINGALOGICALSYSTEMDESIGNSTARTWITHTHESYSTEMSBASICFUNCTIONSTHEKEYISKEEPINGTRACKOFTHESTOCKONHANDFOREACHPRODUCTININVENTORYINVENTORYCHANGESBECAUSECUSTOMERSPURCHASE,EXCHANGE,ANDRETURNPRODUCTS,SOTHESYSTEMWILLHAVETOPROCESSCUSTOMERTRANSACTIONSTHESTORESOWNERWANTSTOSELECTIVELYLOOKATTHEINVENTORYLEVELFORANYPRODUCTINSHORTSUPPLYAND,IFAPPROPRIATE,ORDERREPLACEMENTSTOCK,SOTHESYSTEMMUSTBEABLETOCOMMUNICATEWITHMANAGEMENTFINALLY,FOLLOWINGMANAGEMENTAUTHORIZATION,THESYSTEMSHOULDGENERATEAREORDERREADYTOSENDTOASUPPLIERFIG1GIVENTHESYSTEMSBASICFUNCTIONS,THEANALYSTSNEXTTASKISGAININGASENSEOFTHEIRLOGICALRELATIONSHIPAGOODWAYTOSTARTISBYDESCRIBINGHOWDATAFLOWBETWEENTHEFUNCTIONSASTHENAMEIMPLIES,DATAFLOWDIAGRAMSAREPARTICULARLYUSEFULFORGRAPHICALLYDESCRIBINGTHESEDATAFLOWSFOURSYMBOLSAREUSEDFIG1DATASOURCESANDDESTINATIONSAREREPRESENTEDBYSQUARES;INPUTDATAENTERTHESYSTEMFROMASOURCE,ANDOUTPUTDATAFLOWTOADESTINATIONONCEINTHESYSTEM,THEDATAAREMANIPULATEDORCHANGEBYPROCESSES,REPRESENTEDBYROUNDCORNERRECTANGLESAPROCESSMIGHTBEAPROGRAM,APROCEDURE,ORANYTHINGELSETHATCHANGESORMOVESDATADATACANBEHELDFORLATERPROCESSINGINDATASTORES,SYMBOLIZEDBYOPENENDEDRECTANGLESADATASTOREMIGHTBEADISKFILE,ATAPEFILE,ADATABASE,WRITTENNOTES,OREVENAPERSONSMEMORYFINALLY,DATAFLOWBETWEENSOURCES,DESTINATIONS,PROCESSES,ENDDATASTORESOVERDATAFLOWS,WHICHAREREPRESENTEDBYARROWSFIG2FIGURE2SHOWSAPRELIMINARYDATAFLOWDIAGRAMFORTHEINVENTORYSYSTEMSTARTWITHCUSTOMERTRANSACTIONSFLOWFROMACUSTOMERFINTOTHESYSTEM,WHERETHEYAREHANDLEDBYPROCESSTRANSACTIONADATASTORE,STOCK,HOLDSDATAONEACHITEMININVENTORYPROCESSTRANSACTIONCHANGESTHEDATATOREFLECTTHENEWTRANSACTIONMEANWHILE,MANAGEMENTACCESSESTHESYSTEMTHROUGHCOMMUNICATE,EVALUATINGTHEDATAINSTOCKAND,IFNECESSARY,REQUESTINGAREORDERONCEAREORDERISAUTHORIZEDGENERATEREORDERSENDSNECESSARYDATATOTHESUPPLIER,WHOSHIPSTHEITEMSTOTHESTORENOTETHAT,BECAUSETHEREORDERREPRESENTSACHANGEINTHEINVENTORYLEVELOFAPARTICULARPRODUCTORPRODUCTSITISHANDLEDASATRANSACTIONTHEDATAFLOWDIAGRAMDESCRIBESTHELOGICALSYSTEMTHENEXTSTEPISTRACINGTHEDATAFLOWSSTARTWITHTHEDESTINATIONSUPPLIERREORDERSFLOWTOSUPPLIERS;FOREXAMPLE,THESTOREMIGHTWANT25PAIRSOFJEANSTOFILLTHEORDER,THESUPPLIERNEEDSTHEPRODUCTDESCRIPTIONANDTHEREORDERQUANTITYWHEREDOTHESEDATAELEMENTSCOMEFROMSINCETHEYAREOUTPUTBYGENERATEREORDER,THEYMUSTEITHERBEINPUTTOORGENERATEDBYTHISPROCESSDATAFLOWINTOGENERATEREORDERFORSTOCK;THUS,PRODUCTDESCRIPTIONSANDREORDERQUANTITIESMUSTBESTOREDINSTOCKOTHERDATAELEMENTS,SUCHASTHEITEMPURCHASEDANDTHEPURCHASEQUANTITYAREGENERATEDBYCUSTOMERSTILLOTHERS,FOREXAMPLESELLINGPRICEANDREORDERPOINT,AREGENERATEDBYORNEEDEDBYMANAGEMENTTHECURRENTSTOCKONHANDFORAGIVENITEMISANEXAMPLEOFADATAELEMENTGENERATEDBYANALGORITHMINONEOFTHEPROCEDURESSTEPBYSTEP,METHODICALLY,THEANALYSTIDENTIFIESTHEDATAELEMENTSTOBEINPUTTOSTOREDBY,MANIPULATEDBY,GENERATEDBY,OROUTPUTBYTHESYSTEMTOKEEPTRACKOFTHEDATAELEMENTS,THEANALYSTMIGHTLISTEACHONEINADATADICTIONARYASIMPLEDATADICTIONARYCANBESETUPONINDEXCARDS,BUTCOMPUTERIZEDDATADICTIONARIESHAVEBECOMEINCREASINGLYPOPULARTHEDATADICTIONARY,ACOLLECTIONOFDATADESCRIBINGANDDEFININGTHEDATA,ISUSEFULTHROUGHOUTTHESYSTEMSANALYSISANDDESIGNPROCESS,ANDISOFTENUSEDTOBUILDADATABASEDURINGTHEIMPLEMENTATIONSTAGETHEIDEAOFANALYSISISTODEFINETHESYSTEMSMAJORFUNCTIONSANDDATAELEMENTSMETHODICALLYREMEMBERTHATTHEOBJECTIVEISTRANSLATINGUSERNEEDSINTOTECHNICALTERMSSINCETHESYSTEMSTARTSWITHTHEUSER,THEFIRSTSTEPISDEFININGTHEUSERSNEEDSUSERSTHINKINTERMSOFFUNCTIONSANDDATATHEYDONOTVISUALIZEPROGRAMS,ORFILES,ORHARDWAREANDDURINGTHISINITIAL,CRUCIALANALYSISSTAGEITISESSENTIALTHATTHEANALYSTTHINKLIKEAUSER,NOTLIKEAPROGRAMMERDATAFLOWDIAGRAMSANDDATADICTIONARIESAREUSEFULTOOLSTHEYPROVIDEAFORMATFORRECORDINGKEYINFORMATIONABOUTTHEPROPOSEDSYSTEMALSO,THEYJOGTHEANALYSTSMEMORYFOREXAMPLE,IFTHEANALYSTDOESNTHAVESUFFICIENTINFORMATIONTOCOMPLETEADATADICTIONARYENTRY,HEORSHEHASPROBABLYMISSEDSOMETHINGPERHAPSMOSTIMPORTANTLY,THEDATAFLOWDIAGRAMANDTHEDATADICTIONARYDOCUMENTTHEANALYSTSUNDERSTANDINGOFTHESYSTEMREQUIREMENTSBYREVIEWINGTHESEDOCUMENTS,THEUSERCANCORRECTMISUNDERSTANDINGSOROVERSIGHTSFINALLY,THEYREPRESENTANEXCELLENTSTARTINGPOINTTHENEXTSTEP,DESIGN23DESIGNASWEENTERTHEDESIGNSTAGE,WEKNOWWHATTHESYSTEMMUSTDO,ANDTHUSCANBEGINTHINKINGABOUTHOWTODOITTHEOBJECTIVEISTODEVELOPASTRATEGYFORSOLVINGTHEPROBLEMATTHISSTAGE,WEARENOTINTERESTEDINWRITINGCODEORINDEFININGPRECISEDATASTRUCTURES;INSTEAD,WEWANTTOIDENTIFY,ATABLACKBOXLEVEL,NECESSARYPROGRAMS,FILES,PROCEDURES,ANDOTHERCOMPONENTSTHEDATAFLOWDIAGRAMDEFINESTHESYSTEMSNECESSARYFUNCTIONS;HOWMIGHTTHEYBEIMPLEMENTEDONEPOSSIBILITYISWRITINGONEPROGRAMFOREACHPROCESSANOTHERISCOMBININGTWOORMOREPROCESSESINASINGLEPROGRAM;THEREAREDOZENSOFALTERNATIVESOLUTIONSLETSFOCUSONONEOPTIONANDDOCUMENTITASYSTEMFLOWCHARTUSESSYMBOLSTOREPRESENTPROGRAMS,PROCEDURES,HARDWAREDEVICES,ANDTHEOTHERCOMPONENTSOFAPHYSICALSYSTEMFIG3OURFLOWCHARTFIG4SHOWSTHATTRANSACTIONDATAENTERTHESYSTEMTHROUGHATERMINAL,AREPROCESSEDBYADATACOLLECTIONPROGRAM,ANDTHENARESTOREDONANINVENTORYFILEEVENTUALLY,THEINVENTORYFILEISPROCESSEDBYAREPORTANDREORDERPROGRAMTHROUGHIT,MANAGEMENTMANIPULATESTHEDATAANDAUTHORIZESREORDERSFIG4ONASYSTEMFLOWCHART,SYMBOLSREPRESENTPROGRAMS,PROCEDURES,HARDWAREDEVICES,ANDTHEOTHERCOMPONENTSOFAPHYSICALSYSTEMFIG3LOOKATTHESYSTEMFLOWCHARTITIDENTIFIESSEVERALHARDWARECOMPONENTS,INCLUDINGACOMPUTER,ADISKDRIVE,ADATAENTRYTERMINAL,APRINTER,ANDADISPLAYTERMINALTWOPROGRAMSARENEEDED;PROCESSTRANSACTIONANDREPORTANDREORDERINADDITIONTOTHEHARDWAREANDTHEPROGRAMS,WE1LNEEDDATASTRUCTURESFORTHEINVENTORYFILEANDFORDATAFLAWSBETWEENTHEI/ODEVICESANDTHESOFTWARENOTETHATTHISSYSTEMFLOWCHARTILLUSTRATESONEPOSSIBLESOLUTION;AGOODANALYSTWILLDEVELOPSEVERALFEASIBLEALTERNATIVESBEFORECHOOSINGONEFIG4THEFLOWCHARTMAPSTHESYSTEM,HIGHLIGHTINGITSMAJORPHYSICALCOMPONENTSSINCETHEDATALINKTHECOMPONENTS,THENEXTTASKISDEFININGTHEDATASTRUCTURESCONSIDER,FOREXAMPLE,THEINVENTORYFILEITCONTAINSALLTHEDATAELEMENTSFROMTHEDATASTORESTOCKTHEDATAELEMENTSARE
编号:201311171035255465    类型:共享资源    大小:79.00KB    格式:DOC    上传时间:2013-11-17
  
5
关 键 词:
教育专区 外文翻译 精品文档 中英文翻
  人人文库网所有资源均是用户自行上传分享,仅供网友学习交流,未经上传用户书面授权,请勿作他用。
关于本文
本文标题:中英文翻译系统的分析与设计.doc
链接地址:http://www.renrendoc.com/p-95465.html

当前资源信息

4.0
 
(2人评价)
浏览:27次
英文资料库上传于2013-11-17

官方联系方式

客服手机:17625900360   
2:不支持迅雷下载,请使用浏览器下载   
3:不支持QQ浏览器下载,请用其他浏览器   
4:下载后的文档和图纸-无水印   
5:文档经过压缩,下载后原文更清晰   

相关资源

  • Thomas_Calculus_13th(托马斯微积分 13版)Thomas_Calculus_13th(托马斯微积分 13版)
  • [机械模具数控自动化专业毕业设计外文文献及翻译]【期刊2016】借助于电缆驱动系统改进工业机器人的静态性-中文翻译[机械模具数控自动化专业毕业设计外文文献及翻译]【期刊2016】借助于电缆驱动系统改进工业机器人的静态性-中文翻译
  • [机械模具数控自动化专业毕业设计外文文献及翻译]【期刊2016】借助于电缆驱动系统改进工业机器人的静态性-外文文献[机械模具数控自动化专业毕业设计外文文献及翻译]【期刊2016】借助于电缆驱动系统改进工业机器人的静态性-外文文献
  • [机械模具数控自动化专业毕业设计外文文献及翻译]【期刊】最小化模式下料问题科林麦克迪尔米德-中文翻译[机械模具数控自动化专业毕业设计外文文献及翻译]【期刊】最小化模式下料问题科林麦克迪尔米德-中文翻译
  • [机械模具数控自动化专业毕业设计外文文献及翻译]【期刊】组合机床行业现状与发展思考-中文翻译[机械模具数控自动化专业毕业设计外文文献及翻译]【期刊】组合机床行业现状与发展思考-中文翻译
  • [机械模具数控自动化专业毕业设计外文文献及翻译]【期刊】自行航水器真正自治-中文翻译[机械模具数控自动化专业毕业设计外文文献及翻译]【期刊】自行航水器真正自治-中文翻译
  • [机械模具数控自动化专业毕业设计外文文献及翻译]【期刊】自行航水器真正自治-外文文献[机械模具数控自动化专业毕业设计外文文献及翻译]【期刊】自行航水器真正自治-外文文献
  • [机械模具数控自动化专业毕业设计外文文献及翻译]【期刊】注塑模具的设计与热分析-中文翻译[机械模具数控自动化专业毕业设计外文文献及翻译]【期刊】注塑模具的设计与热分析-中文翻译
  • [机械模具数控自动化专业毕业设计外文文献及翻译]【期刊】注塑模的单浇口优化-中文翻译[机械模具数控自动化专业毕业设计外文文献及翻译]【期刊】注塑模的单浇口优化-中文翻译
  • [机械模具数控自动化专业毕业设计外文文献及翻译]【期刊】注塑模的单浇口优化-外文文献[机械模具数控自动化专业毕业设计外文文献及翻译]【期刊】注塑模的单浇口优化-外文文献
  • [机械模具数控自动化专业毕业设计外文文献及翻译]【期刊】主轴平衡力和曲轴弯曲应力的研究-中文翻译[机械模具数控自动化专业毕业设计外文文献及翻译]【期刊】主轴平衡力和曲轴弯曲应力的研究-中文翻译
  • [机械模具数控自动化专业毕业设计外文文献及翻译]【期刊】轴对称降落伞形状的研究-中文翻译[机械模具数控自动化专业毕业设计外文文献及翻译]【期刊】轴对称降落伞形状的研究-中文翻译
  • [机械模具数控自动化专业毕业设计外文文献及翻译]【期刊】轴对称降落伞形状的研究-外文文献[机械模具数控自动化专业毕业设计外文文献及翻译]【期刊】轴对称降落伞形状的研究-外文文献
  • [机械模具数控自动化专业毕业设计外文文献及翻译]【期刊】中国乘用车燃料经济性标准的组成和影响-中文翻译[机械模具数控自动化专业毕业设计外文文献及翻译]【期刊】中国乘用车燃料经济性标准的组成和影响-中文翻译
  • [机械模具数控自动化专业毕业设计外文文献及翻译]【期刊】指垫和平面之间的动态交互作用:实验和分析-中文翻译[机械模具数控自动化专业毕业设计外文文献及翻译]【期刊】指垫和平面之间的动态交互作用:实验和分析-中文翻译
  • [机械模具数控自动化专业毕业设计外文文献及翻译]【期刊】指垫和平面之间的动态交互作用:实验和分析-外文文献[机械模具数控自动化专业毕业设计外文文献及翻译]【期刊】指垫和平面之间的动态交互作用:实验和分析-外文文献
  • [机械模具数控自动化专业毕业设计外文文献及翻译]【期刊】直线电机高速数控切断机的发展-中文翻译[机械模具数控自动化专业毕业设计外文文献及翻译]【期刊】直线电机高速数控切断机的发展-中文翻译
  • [机械模具数控自动化专业毕业设计外文文献及翻译]【期刊】直线电机高速数控切断机的发展-外文文献[机械模具数控自动化专业毕业设计外文文献及翻译]【期刊】直线电机高速数控切断机的发展-外文文献
  • [机械模具数控自动化专业毕业设计外文文献及翻译]【期刊】支持机床系统的面向对象设计-中文翻译[机械模具数控自动化专业毕业设计外文文献及翻译]【期刊】支持机床系统的面向对象设计-中文翻译
  • [机械模具数控自动化专业毕业设计外文文献及翻译]【期刊】支持机床系统的面向对象设计-外文文献[机械模具数控自动化专业毕业设计外文文献及翻译]【期刊】支持机床系统的面向对象设计-外文文献
  • [机械模具数控自动化专业毕业设计外文文献及翻译]【期刊】振动镗孔与振动钻孔的研究-中文翻译[机械模具数控自动化专业毕业设计外文文献及翻译]【期刊】振动镗孔与振动钻孔的研究-中文翻译
  • 精品推荐

    相关阅读

    人人文库
    关于我们 - 网站声明 - 网站地图 - 资源地图 - 友情链接 - 网站客服客服 - 联系我们

    网站客服QQ:2846424093    人人文库上传用户QQ群:460291265   

    [email protected] 2016-2018  renrendoc.com 网站版权所有   南天在线技术支持

    经营许可证编号:苏ICP备12009002号-5