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Is your ruler long enough?
RUUULER is an unlimited ruler
Have you had trouble with the length of ruler that they are never long enough to use? Have you got bother with the slippery ruler?
RUUULER can free the ruler from length limitation; 15 cm ruler can create unlimited length.
Unlimited Straight line, Unlimited distance.
Tse-Ming, Chen Yu-Hsuan, Hsiao Hao-Sheng, Liu Po-Hsun, Li