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<p><b>53 POVRCHOV&Eacute; T&#344;EN&Iacute; <a href="../reg_gbr/rrs_53.htm"><img src="bilder/englflagk.gif" border="0" height="23" width="32"></a> </b></p>
<p align="justify">Lo&#271; nesm&iacute; vypou&#353;t&#283;t nebo uvol&#328;ovat
l&aacute;tky jako jsou polymery nebo m&iacute;t speci&aacute;ln&#283;
upraven&yacute; povrch, kter&yacute; by mohl zlep&#353;it charakter
obt&eacute;k&aacute;n&iacute; vody uvnit&#345; mezn&iacute; vrstvy.</p>
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