<tbody>

<th colspan="3">

<strong>

<span t-field="o.material_ids.color_id" />

<span t-field="o.material_ids.print_side" />

</strong>

<br />

<t t-if="not o.material_ids.papercut_id.cut_image">

<span t-field="o.material_ids.papercut_id.cut_image"

t-field-options='{"widget": "image"}'>

</span>

</t>

<br />

<span t-field="o.material_ids.formula" />

</th>

</tbody>

My code is not working, how to cheking?