Odoo-Build/snippets/mint_system.purchase.report_purchasequotation_document.add_default_code.xml

<data priority="50">
    <xpath expr="//thead/tr/th[1]" position="after">
        <th>
            <strong>Artikel Nr.</strong>
        </th>
    </xpath>
    <xpath expr="//tbody/t/tr/t[1]/td[1]" position="after">
        <td>
            <span t-field="order_line.product_id.default_code"/>
        </td>
    </xpath>
</data>