<https://hydronexgen.com/vane-pumps/much-ado-about-vane-pumps-specifications-and-advantage-of-the-machinery/>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://hydronexgen.com/vane-pumps/much-ado-about-vane-pumps-specifications-and-advantage-of-the-machinery/>