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1、SelectionParagraphFormatLineSpacingLinesToPointsSelectionParagraphFormatLineSpacingLinesToPointselectionParagraaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaphFormatLineSpacingLinesToPointsSelectionParagraphFormatLineSpacingLinesTSelectionParbbbbbbbbbbbbbbbbbbbbbbbbbbbb
2、bbbbbbbbbbbbbbbbbbbbbbbbbbbbbagraphFoLineSpacingLinesToPointsSelectionParagraphFormatLineSpacingLinesToPointselectionParagraphFormatLineSpacingLinesToPointsSelectionParagraphFormatLineSpacingLinesToPoctionParagraphFormatLineSpacingLinesToPoints2SelectionParagraphFormatLi
3、neSpacingLinesToPointsSelectionParagraphFormatLineSpacingLinesToPointselectionParagraphFccccccccccccccccccccccccccccccccccccccccccccccccccccccccormatLineSpacingLinesToPointsSelectionParagraphFormatLineSpacingLinesToPoctionParagraSelecSelectionParagraphFormatLineSpacingLi
4、nesToPointsSelectionParagraphFormatLineSpacingLinesToPointselectionParagraaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaphFormatLineSpacingLinesToPointsSelectionParagraphFormatLineSpacingLinesTSelectionParbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbagraphFo
5、LineSpacingLinesToPointsSelectionParagraphFormatLineSpacingLinesToPointselectionParagraphFormatLineSpacingLinesToPointsSelectionParagraphFormatLineSpacingLinesToPoctionParagraphFormatLineSpacingLinesToPoints2SelectionParagraphFormatLineSpacingLinesToPointsSelectionParagr
6、aphFormatLineSpacingLinesToPointselectionParagraphFccccccccccccccccccccccccccccccccccccccccccccccccccccccccormatLineSpacingLinesToPointsSelectionParagraphFormatLineSpacingLinesToPoctionParagraSelec畢業(yè)設(shè)計摘要PLC（可編程控制器）作為一種工業(yè)控制微型計算機，它是采用軟件編制程序來實現(xiàn)控制要求的。編程時要使用到各種編程元件，它們可提供無數(shù)個動合
7、和動斷觸點。編程元件是指輸入寄存器、輸出寄存器、位存儲器、定時器、計數(shù)器、通用寄存器、數(shù)據(jù)寄存器及特殊功能存儲器等。它以其編程方便、操作簡單尤其是它的高可靠性等優(yōu)點，在工業(yè)生產(chǎn)過程中得到了廣泛的應(yīng)用。它應(yīng)用大規(guī)模集成電路，微型技術(shù)和通訊技術(shù)的發(fā)展成果，逐步形成了具有多種優(yōu)點和微型，中型，大型，超大要型等各種規(guī)格的系列產(chǎn)品，應(yīng)用于繼電器控制系統(tǒng)到監(jiān)控計算機之間的許多控制領(lǐng)域。隨著社會的不斷發(fā)展，醫(yī)學的發(fā)展，而病床呼叫器也成為了醫(yī)院的必須設(shè)備。由以前手動搖鈴發(fā)展到今天的按鈕操縱，為醫(yī)院的管理做出了不可磨滅的貢獻。SelectionParag
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