| 摘要 |
A drafting device includes a plate (11) having a number of longitudinal lines and lateral lines (12) intersected with each other for forming a number of grids (13) and intersected points (30). The plate (11) includes one or more side edges each having a number of graduation dots (20) and an indication point (28) formed in each of the dots (20). One of the longitudinal lines (12) includes one or more holes (14) for engaging pen points. One or more inclined lines {18) are intersected with the holes (14). One or more short lines (15) and segments (16) are applied in each of the grids (13).
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