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src=data:imagegifbase64iVBORw0KGgoAAAANSUhEUgAAAAIAAAACCAQAAADYv8WvAAAAD0lEQVR42mP8X8AwAgiABKBAv+vAXklAAAAAElFTkSuQmCC data-src=https:reader043vdocumentspubreader043viewer2022031720559312d31a28ab76188b46e9html5thumbnails2jpg width=140 height=200 adivdivdiv class=ts-pagebutton class=gotoPage data-page=3Page 3button div class=ts-imagea href=https:reader043vdocumentspubreader043viewer2022031720559312d31a28ab76188b46e9html5page3jpg target=_blank img data-url=-3-559312d31a28ab76188b46e9htmlpage=3 data-page=3 class=ts-thumb lazyload alt=Page 3: บทที่ 3 สื่อการเรียนการสอน loading=lazy src=data:imagegifbase64iVBORw0KGgoAAAANSUhEUgAAAAIAAAACCAQAAADYv8WvAAAAD0lEQVR42mP8X8AwAgiABKBAv+vAXklAAAAAElFTkSuQmCC data-src=https:reader043vdocumentspubreader043viewer2022031720559312d31a28ab76188b46e9html5thumbnails3jpg width=140 height=200 adivdivdiv class=ts-pagebutton class=gotoPage data-page=4Page 4button div class=ts-imagea 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alt=Page 7: บทที่ 3 สื่อการเรียนการสอน loading=lazy src=data:imagegifbase64iVBORw0KGgoAAAANSUhEUgAAAAIAAAACCAQAAADYv8WvAAAAD0lEQVR42mP8X8AwAgiABKBAv+vAXklAAAAAElFTkSuQmCC data-src=https:reader043vdocumentspubreader043viewer2022031720559312d31a28ab76188b46e9html5thumbnails7jpg width=140 height=200 adivdivdiv class=ts-pagebutton class=gotoPage data-page=8Page 8button div class=ts-imagea href=https:reader043vdocumentspubreader043viewer2022031720559312d31a28ab76188b46e9html5page8jpg target=_blank img data-url=-3-559312d31a28ab76188b46e9htmlpage=8 data-page=8 class=ts-thumb lazyload alt=Page 8: บทที่ 3 สื่อการเรียนการสอน loading=lazy src=data:imagegifbase64iVBORw0KGgoAAAANSUhEUgAAAAIAAAACCAQAAADYv8WvAAAAD0lEQVR42mP8X8AwAgiABKBAv+vAXklAAAAAElFTkSuQmCC data-src=https:reader043vdocumentspubreader043viewer2022031720559312d31a28ab76188b46e9html5thumbnails8jpg width=140 height=200 adivdivdiv class=ts-pagebutton class=gotoPage data-page=9Page 9button div class=ts-imagea 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class=ts-thumb lazyload alt=Page 12: บทที่ 3 สื่อการเรียนการสอน loading=lazy src=data:imagegifbase64iVBORw0KGgoAAAANSUhEUgAAAAIAAAACCAQAAADYv8WvAAAAD0lEQVR42mP8X8AwAgiABKBAv+vAXklAAAAAElFTkSuQmCC data-src=https:reader043vdocumentspubreader043viewer2022031720559312d31a28ab76188b46e9html5thumbnails12jpg width=140 height=200 adivdivdiv class=ts-pagebutton class=gotoPage data-page=13Page 13button div class=ts-imagea href=https:reader043vdocumentspubreader043viewer2022031720559312d31a28ab76188b46e9html5page13jpg target=_blank img data-url=-3-559312d31a28ab76188b46e9htmlpage=13 data-page=13 class=ts-thumb lazyload alt=Page 13: บทที่ 3 สื่อการเรียนการสอน loading=lazy src=data:imagegifbase64iVBORw0KGgoAAAANSUhEUgAAAAIAAAACCAQAAADYv8WvAAAAD0lEQVR42mP8X8AwAgiABKBAv+vAXklAAAAAElFTkSuQmCC data-src=https:reader043vdocumentspubreader043viewer2022031720559312d31a28ab76188b46e9html5thumbnails13jpg width=140 height=200 adivdivdiv class=ts-pagebutton class=gotoPage data-page=14Page 14button div 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class=ts-thumb lazyload alt=Page 17: บทที่ 3 สื่อการเรียนการสอน loading=lazy src=data:imagegifbase64iVBORw0KGgoAAAANSUhEUgAAAAIAAAACCAQAAADYv8WvAAAAD0lEQVR42mP8X8AwAgiABKBAv+vAXklAAAAAElFTkSuQmCC data-src=https:reader043vdocumentspubreader043viewer2022031720559312d31a28ab76188b46e9html5thumbnails17jpg width=140 height=200 adivdivdiv class=ts-pagebutton class=gotoPage data-page=18Page 18button div class=ts-imagea href=https:reader043vdocumentspubreader043viewer2022031720559312d31a28ab76188b46e9html5page18jpg target=_blank img data-url=-3-559312d31a28ab76188b46e9htmlpage=18 data-page=18 class=ts-thumb lazyload alt=Page 18: บทที่ 3 สื่อการเรียนการสอน loading=lazy src=data:imagegifbase64iVBORw0KGgoAAAANSUhEUgAAAAIAAAACCAQAAADYv8WvAAAAD0lEQVR42mP8X8AwAgiABKBAv+vAXklAAAAAElFTkSuQmCC data-src=https:reader043vdocumentspubreader043viewer2022031720559312d31a28ab76188b46e9html5thumbnails18jpg width=140 height=200 adivdivdiv class=ts-pagebutton class=gotoPage data-page=19Page 19button div 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class=ts-thumb lazyload alt=Page 22: บทที่ 3 สื่อการเรียนการสอน loading=lazy src=data:imagegifbase64iVBORw0KGgoAAAANSUhEUgAAAAIAAAACCAQAAADYv8WvAAAAD0lEQVR42mP8X8AwAgiABKBAv+vAXklAAAAAElFTkSuQmCC data-src=https:reader043vdocumentspubreader043viewer2022031720559312d31a28ab76188b46e9html5thumbnails22jpg width=140 height=200 adivdivdiv class=ts-pagebutton class=gotoPage data-page=23Page 23button div class=ts-imagea href=https:reader043vdocumentspubreader043viewer2022031720559312d31a28ab76188b46e9html5page23jpg target=_blank img data-url=-3-559312d31a28ab76188b46e9htmlpage=23 data-page=23 class=ts-thumb lazyload alt=Page 23: บทที่ 3 สื่อการเรียนการสอน loading=lazy src=data:imagegifbase64iVBORw0KGgoAAAANSUhEUgAAAAIAAAACCAQAAADYv8WvAAAAD0lEQVR42mP8X8AwAgiABKBAv+vAXklAAAAAElFTkSuQmCC data-src=https:reader043vdocumentspubreader043viewer2022031720559312d31a28ab76188b46e9html5thumbnails23jpg width=140 height=200 adivdivdiv class=ts-pagebutton class=gotoPage data-page=24Page 24button div 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