<http://webisa.webdatacommons.org/121706684>	<http://www.w3.org/ns/prov#value>	"A PVC roofing system can decrease your home cooling bills.In addition, this kind of flat roof is extremely resistant to chemicals such as greases, acids or oils.It is very popular in warehouses, markets or other commercial applications. ??? PVC Corrugated Roofing Sheets. 6." .
<http://webisa.webdatacommons.org/121706684>	<http://www.w3.org/ns/prov#wasQuotedFrom>	<howtobuildahouseblog.com> .
<http://webisa.webdatacommons.org/prov/455762477>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/121706684> .
<http://webisa.webdatacommons.org/prov/459826125>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/121706684> .
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