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<br /> <br />40 <br /> <br /> <br /> <br />:?c <br />'\: <br /> <br />;; <br /> <br />~;f:' <br /> <br />," <br /> <br />ii.'i.:,: <br /> <br />:'~ <br /> <br />!1j' <br /> <br /> <br />{1. <br /> <br />$, . <br />,;:;; ~ <br /> <br />;~: <br /> <br /> <br />1;J ~::: l';( <br /> <br /> <br />:(\ <br /> <br />'%2:::; <br /> <br />{if: <br /> <br />@, <a <br /> <br />~~; <br /> <br />:ij <br />;~'; <br />..",',< <br />:?,S; . 0;:;; <br />i:> &.~;- ~ r:a 'tiPJ",. '*' <br />04i2~~<....",~~,;&:.~ <br /> <br />~ <br /> <br />% <br /> <br />~~ ri4l. <br /> <br />ia\t <br /> <br />Figure 30.-Flood shield in place over an air vent. This shield prevents flood waters <br />from entering the subsurface of a building through the air ducts. <br />