| 摘要 |
FIELD: reading block and marked card for optical mark reader. ^ SUBSTANCE: reading block has optical light detection indicator, for detecting light passing through field for answering the question or reflected by aforementioned field, counter for counting number of mark detection cases, aforementioned mark being filed in field for answering the question and central microprocessor unit. Marked card has fields for answering questions, while each field for answering a question has a row of formed marks, while aforementioned areas for filling in with marks are separated by a row of circles, having different diameters. ^ EFFECT: improved efficiency. ^ 2 cl, 6 dwg |
