div class=ts-pagebutton class=gotoPage data-page=1Page 1button div class=ts-imagea href=https:reader043vdocumentspubreader043viewer20220309045b46a9ad7f8b9a501f8c50aahtml5page1jpg target=_blank img data-url=hoc-be-cong-hudng-mach-hd-duoc-su-dung-nhw-la-mot-bo-cam-bien-la-mothtmlpage=1 data-page=1 class=ts-thumb lazyload alt=Page 1: vatlieuxaydungorgvnvatlieuxaydungorgvnUpload48Nam_2017Thang_5Ngay_2VLXDorgTIN HOC - Bê công huðng mach hð duoc sú dung nhw là môt bô cåm bién là môt công loading=lazy src=data:imagegifbase64iVBORw0KGgoAAAANSUhEUgAAAAIAAAACCAQAAADYv8WvAAAAD0lEQVR42mP8X8AwAgiABKBAv+vAXklAAAAAElFTkSuQmCC data-src=https:reader043vdocumentspubreader043viewer20220309045b46a9ad7f8b9a501f8c50aahtml5thumbnails1jpg width=140 height=200 adivdivdiv class=ts-pagebutton class=gotoPage data-page=2Page 2button div class=ts-imagea href=https:reader043vdocumentspubreader043viewer20220309045b46a9ad7f8b9a501f8c50aahtml5page2jpg target=_blank img data-url=hoc-be-cong-hudng-mach-hd-duoc-su-dung-nhw-la-mot-bo-cam-bien-la-mothtmlpage=2 data-page=2 class=ts-thumb lazyload alt=Page 2: vatlieuxaydungorgvnvatlieuxaydungorgvnUpload48Nam_2017Thang_5Ngay_2VLXDorgTIN HOC - Bê công huðng mach hð duoc sú dung nhw là môt bô cåm bién là môt công loading=lazy src=data:imagegifbase64iVBORw0KGgoAAAANSUhEUgAAAAIAAAACCAQAAADYv8WvAAAAD0lEQVR42mP8X8AwAgiABKBAv+vAXklAAAAAElFTkSuQmCC data-src=https:reader043vdocumentspubreader043viewer20220309045b46a9ad7f8b9a501f8c50aahtml5thumbnails2jpg width=140 height=200 adivdivdiv class=ts-pagebutton class=gotoPage data-page=3Page 3button div class=ts-imagea href=https:reader043vdocumentspubreader043viewer20220309045b46a9ad7f8b9a501f8c50aahtml5page3jpg target=_blank img data-url=hoc-be-cong-hudng-mach-hd-duoc-su-dung-nhw-la-mot-bo-cam-bien-la-mothtmlpage=3 data-page=3 class=ts-thumb lazyload alt=Page 3: vatlieuxaydungorgvnvatlieuxaydungorgvnUpload48Nam_2017Thang_5Ngay_2VLXDorgTIN HOC - Bê công huðng mach hð duoc sú dung nhw là môt bô cåm bién là môt công loading=lazy src=data:imagegifbase64iVBORw0KGgoAAAANSUhEUgAAAAIAAAACCAQAAADYv8WvAAAAD0lEQVR42mP8X8AwAgiABKBAv+vAXklAAAAAElFTkSuQmCC data-src=https:reader043vdocumentspubreader043viewer20220309045b46a9ad7f8b9a501f8c50aahtml5thumbnails3jpg width=140 height=200 adivdiv