| 摘要 |
A multi-functional pen has a tapered tube head connected to a lower pen tube which houses a rotary device. The rotary device projects from the lower pen tube at one end. An upper pen tube is connected to the projecting end of the rotary device so as to complete the pen when the tube head, lower pen tube, rotary device and upper pen tube are assembled together. A refill is disposed within the pen and can be replaced by unscrewing any one of the tube head, the upper pen tube or the lower pen tube.
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