| 摘要 |
A tool according to the invention includes elements adapted to achieve a primary function of the tool, and further includes a writing element adapted to achieve a writing function. In one example, the tool is a screwdriver, and the writing element comprises a pencil lead that can be extended from the head end of the screwdriver to achieve a writing function, and retracted within the head end of the screwdriver to perform a screwdriving function.
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