About: http://webisa.webdatacommons.org/271528284

Property	Value
http://www.w3.org/1999/02/22-rdf-syntax-ns#type	http://www.w3.org/ns/prov#Entity
http://www.w3.org/ns/prov#value	le materials, such as limestone, coal, salt, gypsum, alum, brick and tile, etc. the crushing compressive strength of materials should not be in excess of 150Mpa.
http://www.w3.org/ns/prov#wasQuotedFrom	alibaba.com