| 摘要 |
A mechanical lead pencil having the capability of feeding different diameter leads. A first collet is disposed in the pencil barrel for feeding the lead and a second collet is located at the barrel open end for retaining the lead during use of the pencil. An elastomeric disc is provided between the two collets, having a variable diameter opening at the center thereof for frictionally engaging the lead and preventing its release when the two collets are in the open position.
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