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Many people like doing exercise and keep doing so on travel or business trip. However, some of the sports facilities, for example,
the traditional dumbbell, are hardly within people’s consideration to carry for their bigness and heaviness. Our design overcomes
those shortcomings of the traditional dumbbell as it works only by filling in water.Lightweight and portable, it makes it easy for p-
eople on travel or business trip to do exercise. It also echoes dumbbell funs’ needs for handy-taking facilities and ready exercise.
Wang Song，Fan Xiaofei，Liu Qi