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Ancient Chinese craftsman follow the dimension of the Luban and are sized to meet the auspicious numbers. The Luban measuring tape are separated into two parts:one is for yang and the other is for yin.
But the Luban tapes mark( letter level) is too small to recognize the information. Besides, it is difficult for the public to recognize the real meaning because of the less infornation.
1.more easily handhold
2.short distance measure
4.expanded survey scope
National Taipei University of Tech