div class=trans-pagebutton class=gotoPage data-page=1Page 1button div class=trans-imageimg data-url=documentpdfec94-aaaaaaaa-81-british-standards-institution-british-standardhtmlpage=1 data-page=1 class=trans-thumb lazyload alt=Page 1: PDFEC94 - หน้าหลัก81 British Standards Institution British Standard Testing Concrete BS 1881: Part 108: 1983 82 British Standards Institution British Standard Testing loading=lazy src=data:imagegifbase64iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAQAAAC1HAwCAAAAC0lEQVR42mM8Uw8AAh0BTZud3BwAAAAASUVORK5CYII= data-src=https:reader033fdocumentsinreader033viewer20220418015e51b8f3fab140259d281837html5thumbnails1jpg width=140 height=200 divdivdiv class=trans-pagebutton class=gotoPage data-page=2Page 2button div class=trans-imageimg data-url=documentpdfec94-aaaaaaaa-81-british-standards-institution-british-standardhtmlpage=2 data-page=2 class=trans-thumb lazyload alt=Page 2: PDFEC94 - หน้าหลัก81 British Standards Institution British Standard Testing Concrete BS 1881: Part 108: 1983 82 British Standards Institution British Standard Testing loading=lazy src=data:imagegifbase64iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAQAAAC1HAwCAAAAC0lEQVR42mM8Uw8AAh0BTZud3BwAAAAASUVORK5CYII= data-src=https:reader033fdocumentsinreader033viewer20220418015e51b8f3fab140259d281837html5thumbnails2jpg width=140 height=200 divdivdiv class=trans-pagebutton class=gotoPage data-page=3Page 3button div class=trans-imageimg data-url=documentpdfec94-aaaaaaaa-81-british-standards-institution-british-standardhtmlpage=3 data-page=3 class=trans-thumb lazyload alt=Page 3: PDFEC94 - หน้าหลัก81 British Standards Institution British Standard Testing Concrete BS 1881: Part 108: 1983 82 British Standards Institution British Standard Testing loading=lazy src=data:imagegifbase64iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAQAAAC1HAwCAAAAC0lEQVR42mM8Uw8AAh0BTZud3BwAAAAASUVORK5CYII=...