<http://schema.org/description>
"We have a problem with our EN (high-P): after two to three turnovers, we have nickel balls (about 50-100 microns) forming on our parts; after one to two more turnovers it\u2019s OK again."^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.pfonline.com/articles/nickel-balls>