<https://secure.gravatar.com/avatar/cb1da6817198f4dbf65ffd97417e79b8?s=96&amp;d=mm&amp;r=g>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://viamvina.com.vn/pro/apph-phase-noise-analyzer-up-to-40-ghz-3/>