Circular flat ends with a relief groove
<img src="https://eng-calculations.com/SVG/EN/EN_13445-3/Circular flat ends with a relief groove.svg" alt="Circular_flat_ends_with_a_relief_groove" title="Circular_flat_ends_with_a_relief_groove">
https://eng-calculations.com/SVG/EN/EN_13445-3/Circular flat ends with a relief groove.svg