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<http://webisa.webdatacommons.org/prov/247289260>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/37025220> .
<http://webisa.webdatacommons.org/37025220>	<http://www.w3.org/ns/prov#value>	"Also known to the art is a silk-hat-shaped flexible external gear comprising an annular diaphragm formed to extend radially outward continuously from one end of a cylindrical body and an annular boss formed to continue from the outer edge of the diaphragm." .
<http://webisa.webdatacommons.org/37025220>	<http://www.w3.org/ns/prov#wasQuotedFrom>	<google.com> .