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<http://webisa.webdatacommons.org/prov/50103603>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/130163581> .
<http://webisa.webdatacommons.org/130163581>	<http://www.w3.org/ns/prov#value>	"Such means takes the form of a guard 161 formed of a suitable material such as rubber or plastic which surrounds the" .
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<http://webisa.webdatacommons.org/130163581>	<http://www.w3.org/ns/prov#wasQuotedFrom>	<patents.com> .