using my owner css on Ext.net Controls

[Egale]

Dear all,

I have page contain combo Boxes with icon for each combo Boxes, I want to use unique Css for each combo box to put specific wide between
every combo box and it's icon, but the problem that the control inherent from the specific Css ".x-form-field-wrap .x-textfield-icon "
so please if u could to give me help by explain how can i use my style on every control alone without do that on all the same controls in the same page

and thank in advance

this is the code

<asp:Content ID="Content1" ContentPlaceHolderID="cpMain" Runat="Server">
<style type="text/css">
.refreshIcone{
top: 3px;
left: -31px;
}
</style>
 <div style="direction:rtl;float:right;text-align:center;overflow:auto;">
     <script src="PagesJavaScript/TrakingMailsAspx.js" type="text/javascript"></script>
         <script src="../Base/JsBase/BaseJs.js" type="text/javascript"></script>
         <ext:Store IDMode="Static" ID="sMailStatus" runat="server">
        <Reader>
            <ext:JsonReader IDProperty="ID">
                <Fields>
                    <ext:RecordField Name="Name" />
                    <ext:RecordField Name="ID" />
                </Fields>
            </ext:JsonReader>
        </Reader>
    </ext:Store>  
    <ext:Store IDMode="Static" ID="sPriority" runat="server">
        <Reader>
            <ext:JsonReader IDProperty="ID">
                <Fields>
                    <ext:RecordField Name="Name" />
                    <ext:RecordField Name="ID" />
                </Fields>
            </ext:JsonReader>
        </Reader>
    </ext:Store> 
     <ext:FormPanel
                        id="fpMailingTrucking"
                        IDMode="Static"
                        runat="server"
                        AutoHeight="true"
                        Width="900" 
                        Title="البحث عن المعاملات"
                        Border="false"
                        Padding="15">
                        
                        <Items>
						  <ext:ComboBox IDMode="Static" ID="cbMail_Status" StoreID="sMailStatus" runat="server"
                 DisplayField="Name" ValueField="ID" Mode="Local" ForceSelection="true"
                EmptyText="اختر حالة المعاملة " SelectOnFocus="true" AllowBlank="true" AutoShow="true"
                Width="223" Icon="Reload"  Cls="refreshIcone" >
               
            </ext:ComboBox>
             <ext:ComboBox IDMode="Static" ID="cbMailPriorites" StoreID="sPriority" runat="server"
                 DisplayField="Name" ValueField="ID" Mode="Local" ForceSelection="true"
                EmptyText="اختر اولوية المعاملة " SelectOnFocus="true" AllowBlank="true" AutoShow="true"
                Width="223" Cls="refreshIcone" >
               
                  </ext:ComboBox>
				  </ext:Panel>
                                    </ext:Cell>
                                   </Cells>
								      </Items>                
         </ext:FormPanel>