Sketch of a tension test machine. Caption:
<ul><li>mobile part (top);</li>
<li>tension test specimen (middle);</li>
<li>frame.</li></ul>
<a href="//commons.wikimedia.org/wiki/User:Cdang" title="User:Cdang">Cdang</a>
CC BY-SA 3.0
<span class="int-own-work" lang="en">Own work</span>