Putzmeister brand positive displacement mortar and plaster <a href="//commons.wikimedia.org/wiki/Pump" title="Pump">pump</a>, used to pump <a href="//commons.wikimedia.org/wiki/Mortar_(firestop)" title="Mortar (firestop)">firestop mortar</a> into mechanical and electrical through-penetrations in walls and floors required to have a fire-resistance rating. This picture was taken at a pulp and paper mill in <a href="//commons.wikimedia.org/wiki/British_Columbia" title="British Columbia">British Columbia</a>, <a href="//commons.wikimedia.org/wiki/Canada" title="Canada">Canada</a>, early 1990s.
<a href="//commons.wikimedia.org/wiki/User:Achim_Hering" title="User:Achim Hering">Achim Hering</a>
CC BY 3.0
<span class="int-own-work" lang="en">Own work</span>