| 摘要 |
A mechanical pencil comprising a lead feed mechanism built within the body thereof and a lead guide connected to the lead feed mechanism and having a cartridge reception bore of a diameter which is practically the same as the inside diameter of the body, wherein a cartridge containing a plurality of leads and having an outside diameter which is practically the same as the inside diameter of the body and the inside diameter of the cartridge reception bore of the lead guide is detachably fitted in the cartridge reception bore of the lead guide. In replenishing the mechanical pencil with leads, an old cartridge is replaced with a new cartridge.
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