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Do you have any trouble in facing of the problem that the tape can not measure the distance of the wall into a corner accurately? To solve this problem, we have designed that each side of the tape is marked with a number, so that we can get more accurate numerical value when measuring.
Zhijiang College of ZheJiang
ZhiJiang College of ZheJiang
Yingning Fang, Delong Gong, Yinjie Chen, Yichuan Hu