CAM base on PDMРPDMРMouldingРMaterial supportРPerformanceРAnalysisРFile mag.РEngineering DesignРManufactureР4. Types of DBMS structureР①hierarchical model 层项模型РMachine РComponent 1РComponent 2РComponent 3Р1Р1РPart 3Р ②meshy model 网状模型РMachine 1РMachine 2РPart 1РPart 3РPart 2РPart 4Р ③relation modelРnameРNo.РnumРMaterialРskrewР0 1Р1РHT150Р………РSection work Tech Р§2.2РNetwork: a system puters and peripherals that are linked together. work can consist of as few as puters connected by telephone cable ,fiber cable or radio waves. The is an example of work.Рtypes work: Р WAN: wide work Р LAN: load work Рstructure of LANРnetwork card and media Рserver Рworkstation PC Рnet linker HUB 网络集线器Рnetwork os Unix WinNTРPCРNetwork cardРMediaРWorkstationРLinkerРPCРServerРthe topology workРbus Рstart/wye HUB
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