| 摘要 |
PROBLEM TO BE SOLVED: To enable a spare ink to be stored even in a fountain pen contrary to the case with a conventional fountain pen in which the spare ink cannot be stored, although the spare ink is available and the ink to be replenished as soon as the ink supply is compltely consumed. SOLUTION: A spare ink is always stored in a fountain pen. The spare ink storage enables the continuous use of the fountain pen for writing contrary to the case with a conventional fountain pen incorporating no such spare ink.
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