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轮滑包 / Track package

轮滑包
轮滑包

When people play the roller skating will be set up obstacles. This package can be used to measure the height of the telescopic rod. The people playing roller skating when the need to set up a safe area. Top telescopic rod emits red projection to set safety limits.

University

zhengzhou institute of light industry

zhengzhou institute of light industry
zhengzhou, China

qingqing zhang,
zhengzhou institute of light industry

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