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<http://webisa.webdatacommons.org/264468556>	<http://www.w3.org/ns/prov#value>	"Furthermore, in the embodiment, a label 2511 such as a pattern or a character may be printed on the main surface 251 to remind users about a correct opening direction." .
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<http://webisa.webdatacommons.org/prov/243461908>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/264468556> .