div class=ts-pagebuttonPage 1button div class=ts-image amp-img class=ts-thumb alt=Page 1: Fans shall be direct-drive equipped with an impeller with 9 aerodynamic blades and a rotating shroud to ensure optimal leak-tightness between the blades and the fan housing Fans impellers src=https:reader033vdocumentinreader033viewer20220419175e6a0607417a2f0c096e7cd3html5thumbnails1jpg 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: Fans shall be direct-drive equipped with an impeller with 9 aerodynamic blades and a rotating shroud to ensure optimal leak-tightness between the blades and the fan housing Fans impellers src=https:reader033vdocumentinreader033viewer20220419175e6a0607417a2f0c096e7cd3html5thumbnails2jpg width=142 height=106 layout=responsive amp-img divdivdiv class=ts-pagebuttonPage 3button div class=ts-image amp-img class=ts-thumb alt=Page 3: Fans shall be direct-drive equipped with an impeller with 9 aerodynamic blades and a rotating shroud to ensure optimal leak-tightness between the blades and the fan housing Fans impellers src=https:reader033vdocumentinreader033viewer20220419175e6a0607417a2f0c096e7cd3html5thumbnails3jpg width=142 height=106 layout=responsive amp-img divdivdiv class=ts-pagebuttonPage 4button div class=ts-image amp-img class=ts-thumb alt=Page 4: Fans shall be direct-drive equipped with an impeller with 9 aerodynamic blades and a rotating shroud to ensure optimal leak-tightness between the blades and the fan housing Fans impellers src=https:reader033vdocumentinreader033viewer20220419175e6a0607417a2f0c096e7cd3html5thumbnails4jpg width=142 height=106 layout=responsive amp-img divdivdiv class=ts-pagebuttonPage 5button div class=ts-image amp-img class=ts-thumb alt=Page 5: Fans shall be direct-drive equipped with an impeller with 9 aerodynamic blades and a rotating shroud to ensure optimal leak-tightness between the blades and the fan housing Fans impellers src=https:reader033vdocumentinreader033viewer20220419175e6a0607417a2f0c096e7cd3html5thumbnails5jpg width=142 height=106 layout=responsive amp-img divdiv