| 摘要 |
PURPOSE: A triad color board marker is provided to enable a user to easily open and close a lid and have a plastic film which protects the air. CONSTITUTION: A triad color board marker includes three lids. The lids are separated from each other. The lids are used to use different colors. If a user press one of the lids, the user can use a color corresponding to the lid. If a user presses all the three lids, a lead is entered. A plastic film protects the air. The film prevents evaporation. A user can change a color by pressing the opposite side of a lead. |
