<http://schema.org/description>
"ExOne and rapid prototype + manufacturing (rp+m) have collaborated on a new bonded tungsten material that has been added to ExOne\u2019s portfolio of 3D printing materials."^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.mmsonline.com/products/exone-rpm-develop-bonded-tungsten-3d-printing-material>