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the other special is because it uses a special metal alloy, a pen can be used for life, really a bit weird. Its principle is simple: It does not require a pen filled with ink, writing is the use of fine metal shavings, you can write the most words on paper, without any environmental impact can be used normally, while consuming very little metal , which in addition to the advantages of a "one never save", the feel Ye Hao, very easy to carry.
