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Priority claimed from JP27262996Aexternal-prioritypatent/JP3354409B2/ja
Priority claimed from JP08139897Aexternal-prioritypatent/JP3315053B2/ja
Priority claimed from JP24285997Aexternal-prioritypatent/JP3363358B2/ja
Application filed by Matsushita Electric Works LtdfiledCriticalMatsushita Electric Works Ltd
Application grantedgrantedCritical
Publication of TW340890BpublicationCriticalpatent/TW340890B/zh
Material with perforation prevention a material with perforation prevention which comprises multiple different small plates in which the small plates are oriented in the plate material.