div class=ts-pagebuttonPage 1button div class=ts-image amp-img class=ts-thumb alt=Page 1: Piping Isometric Symbols src=https:reader031vdocumentinreader031viewer2022013109577cca1d1a28aba711a568ddhtml5thumbnails1jpg width=142 height=106 layout=responsive amp-img divdivdiv class=ts-pagebuttonPage 2button div class=ts-image amp-img class=ts-thumb alt=Page 2: Piping Isometric Symbols src=https:reader031vdocumentinreader031viewer2022013109577cca1d1a28aba711a568ddhtml5thumbnails2jpg width=142 height=106 layout=responsive amp-img divdiv