NONAQUEOUS ELECTROLYTIC SOLUTION, COMPOSITION FOR POLYMER GEL ELECTROLYTE, POLYMER GEL ELECTROLYTE, SECONDARY CELL, AND ELECTRIC DOUBLE-LAYER CAPACITOR

摘要

The defect in a sheet (1) of high hardness is detected by a line sensor (5) and a mark (2) is provided on the reverse side of the sheet. An independent claim is included for sheet.