| 摘要 |
A graph making device comprises an outer casing having an upper portion and a lower portion, a button placed inside an opening on the upper portion of the outer casing, a support member placed inside the upper portion of the outer casing, the support member having a top portion and a bottom portion, a spring placed inside the upper portion of the outer casing between the button and the support member, wherein the spring is engaged around a projection on the top portion of the support member, an ink pad placed in between the top portion and the bottom portion of the support member, and a graph stamp placed in between the top portion and the bottom portion of the support member and below the ink pad. The graph stamp is configured to produce a Cartesian graph on a graphing paper by pressing the button. |
