| 摘要 |
PURPOSE: A ruler with a correction tape is provided to simplify portability and to improve study efficiency. CONSTITUTION: A ruler comprises a ruler body(1), holder(2), and correction tpae(3). The holder is fixed to the ruler body and holds the correction tape. The holder is separated from the correction tape in case that force is applied to the holder. The correction tape is detachably coupled to a handle. The holder comprises an elastic support(20) and protrusion(21).
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