clinic/netforce_clinic/layouts/clinic_setting.xml

<form model="clinic.setting" title="Clinic Settings">
    <tabs>
        <tab string="Testing">
            <field name="file"/>
            <newline/>
            <button string="Read Case" method="read_hd_case"/>
            <button string="Post" method="done_hd_case"/>
        </tab>
        <tab string="General">
            <separator string="Labor Cost"/>
            <field name="var_k"/>
        </tab>
    </tabs>
</form>