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We have been in pencil, but few people know that a standard 18cm pencil can draw how many metres of line, the answer is 5500km! When we use a pencil, think it too short to put it aside, in fact, it can still draw a long line.
Our concept is about Length. We indicate in the pencil, on behalf of how many CM the pencil left and how many KM the left pencil can draw. When we find a short pencil, indicated that it can still draw a long line, we will not waste it easily to achieve the purpose of savings and environmental protection .
Chen Chao, Ye Wenjin, Sui Tingmeng, Xie Yasong