eh密度计手册

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方法三，找粗细均匀截面形状相同的木棒一根，在一端钉一大铁钉，铁钉上缠一些铁丝也能制成密度计，刻度方法同方法一。
方法四，用铅笔自制密度计，在铅笔一端缠绕数圈细铁丝，使其能在水中直立，刻下此时水面在铅笔杆的位置，即制成简易密度计，将此“密度计放到煤油中，若油面高于刻度线，表明ρ油<ρ水，放到浓食盐水中，若液面低于刻度线，表明ρ油<ρ盐水。若有条件再利用密度不同的已知液体如上法多刻制几条刻度线，使用就更方便了。
密度计的刻度为什么不均匀自制密度计的攻略
(e h 密度计 手册)

CR-410色彩色差计_CR-400色彩色差计_CR-20小型色度计_CR-10Plus小型色差计
FD-9自动扫描分光光度计_FD-7分光密度计_FD-5分光密度计
MultiGloss268A光泽度计
南京多塔分光密度计、照度计、色彩照度计等产品，如需详细了解可点击店铺查看所有产品信息或点击上方详谈
分光测色仪是将性能优良、使用方便的测色计以轻便小巧的方式推向市场的测量产品。便携式分光测色计是将性能优良、使用方便的测色计以轻便小巧的方式推向市场的测量产品。
●可准确测量应测定的位置。拥有明亮的取景器和携带方便的时尚机身。携带方便的机身和明亮的取景器可以迅速、准确、方便地捕捉到测量位置。
(e h 密度计 手册)

8.5StandardInput/OutputLibraryFunctions252 8.6String-ManipulationFunctionsoftheString-HandlingLibrary255 8.7ComparisonFunctionsoftheString-HandlingLibrary257 8.8SearchFunctionsoftheString-HandlingLibrary258 8.9MemoryFunctionsoftheString-HandlingLibrary262 8.10OtherFunctionsoftheString-HandlingLibrary265 Chapter9CFormattedInput/Output277 9.1Introduction277 9.2Streams278 9.3FormattingOutputwithprintf278 9.4PrintingIntegers278 9.5PrintingFloating-PointNumbers279 9.6PrintingStringsandCharacters281 9.7OtherConversionSpecifiers281 9.8PrintingwithFieldWidthsandPrecision282 9.9UsingFlagsintheprintfFormatControlString284 9.10PrintingLiteralsandEscapeSequences286 9.11ReadingFormattedInputwithscanf287 Chapter10CStructures,Unions,BitManipulationsandEnumerations298 10.1Introduction298 10.2StructureDefinitions299 10.3InitializingStructures301 10.4AccessingMembersofStructures301 10.5UsingStructureswithFunctions302 10.6typedef302 10.7Example:High-PerformanceCardShufflingandDealingSimulation303 10.8Unions305 10.9BitwiseOperators307 10.10BitFields313 10.11EnumerationConstants315 Chapter11CFileProcessing325 11.1Introduction325 11.2DataHierarchy326 11.3FilesandStreams327 11.4CreatingaSequential-AccessFile327 11.5ReadingDatafromaSequential-AccessFile331 11.6Random-AccessFiles335 11.7CreatingaRandom-AccessFile335 11.8WritingDataRandomlytoaRandom-AccessFile337 11.9ReadingDatafromaRandom-AccessFile339 11.10CaseStudy:Transaction-ProcessingProgram340 Chapter12CDataStructures353 12.1Introduction353 12.2Self-ReferentialStructures354 12.3DynamicMemoryAllocation355 12.4LinkedLists355 12.5Stacks362 12.6Queues366 12.7Trees370 Chapter13CPreprocessor394 13.1Introduction394 13.2#includePreprocessorDirective395 13.3#definePreprocessorDirective:SymbolicConstants395 13.4#definePreprocessorDirective:Macros395 13.5ConditionalCompilation397 13.6#errorand#pragmaPreprocessorDirectives398 13.7#and##Operators398 13.8LineNumbers398 13.9PredefinedSymbolicConstants399 13.10Assertions399 Chapter14OtherCTopics403 14.1Introduction403 14.2RedirectingInput/OutputonLinux/UNIXandWindowsSystems404 14.3Variable-LengthArgumentLists404 14.4UsingCommand-LineArguments406 14.5NotesonCompilingMultiple-Source-FilePrograms407 14.6ProgramTerminationwithexitandatexit408 14.7volatileTypeQualifier409 14.8SuffixesforIntegerandFloating-PointConstants409 14.9MoreonFiles410 14.10SignalHandling411 14.11DynamicMemoryAllocation:Functionscallocandrealloc413 14.12UnconditionalBranchingwithgoto413 Chapter15GameProgrammingwiththeAllegroCLibrary419 15.1Introduction420 15.2InstallingAllegro420 15.3ASimpleAllegroProgram420 15.4SimpleGraphics:ImportingBitmapsandBlitting421 15.5AnimationwithDoubleBuffering424 15.6ImportingandPlayingSounds429 15.7KeyboardInput432 15.8FontsandDisplayingText436 15.9ImplementingtheGameofPong439 15.10TimersinAllegro444 15.11TheGrabberandAllegroDatafiles447 15.12OtherAllegroCapabilities453 15.13AllegroInternetandWebResources454 Chapter16Sorting:ADeeperLook460 16.1Introduction460 16.2BigONotation461 16.3SelectionSort461 16.4InsertionSort464 16.5MergeSort466 Chapter17IntroductiontoC99474 17.1Introduction475 17.2SupportforC99475 17.3NewC99Headers476 17.4//Comments476 17.5MixingDeclarationsandExecutableCode476 17.6DeclaringaVariableinaforStatementHeader477 17.7DesignatedInitializersandCompoundLiterals478 17.8Typebool480 17.9ImplicitintinFunctionDeclarations481 17.10ComplexNumbers482 17.11Variable-LengthArrays483 17.12OtherC99Features484 17.13InternetandWebResources486 Chapter18C++asaBetterC;IntroducingObjectTechnology490 18.1Introduction491 18.2C++491 18.3ASimpleProgram:AddingTwoIntegers491 18.4C++StandardLibrary493 18.5HeaderFiles494 18.6InlineFunctions495 18.7ReferencesandReferenceParameters496 18.8EmptyParameterLists500 18.9DefaultArguments500 18.10UnaryScopeResolutionOperator501 18.11FunctionOverloading502 18.12FunctionTemplates505 18.13IntroductiontoObjectTechnologyandtheUML507 18.14Wrap-Up510 Chapter19IntroductiontoClassesandObjects516 19.1Introduction517 19.2Classes,Objects,MemberFunctionsandDataMembers517 19.3OverviewoftheChapterExamples518 19.4DefiningaClasswithaMemberFunction518 19.5DefiningaMemberFunctionwithaParameter521 19.6DataMembers,setFunctionsandgetFunctions523 19.7InitializingObjectswithConstructors528 19.8PlacingaClassinaSeparateFileforReusability531 19.9SeparatingInterfacefromImplementation534 19.10ValidatingDatawithsetFunctions538 19.11Wrap-Up542 Chapter20Classes:ADeeperLook,Part1548 20.1Intro

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