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iframe#ifrm {width:100%;min-height:710px;border:0px;margin: 5px;}
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<div id="marker"></div>
<script type="text/javascript">
(function() {var ifrm = document.createElement('iframe');ifrm.setAttribute('id', 'ifrm');var el = document.getElementById('marker');el.parentNode.insertBefore(ifrm, el);ifrm.setAttribute('src', 'https://www.ghbook.ir/read/fa-IR/5998');})();
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