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counting pen / pen

counting pen
counting pen

When counting things or people presented at the meetings or somewhere else,people used to count them with a pen .In order to avoid the mistakes in counting ,we put a mechanism using the principle of pedometer at the end of the pen ,which will help us counting .We can use it to check whether we count it right or not .

University

university of Shanghai Science and Technology

university of Shanghai Science and Technology
Shanghai, China

Design

university of Shanghai Science and Technology

university of Shanghai Science and Technology
Shanghai, China