| 摘要 |
A mechanical carpenter's pencil having an integral sharpening guide providing a reference surface to which the lead may be trimmed for sharpening. The pencil user may use a knife to trim the lead flush with the sharpening guide surface or may abrade the lead on a convenient surface until the lead is flush with the sharpening guide surface. After trimming, the lead is advanced to expose the freshly sharpened point and is ready for precision marking.
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