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Students and designers need to draw pictures at many times. Thus they have many drawing instruments, which are inconvenient to bring alone. Now, with the existence of the three-in-one drawing tool, we can combine the three tools, namely, rulers, compasses and protractor into one. Additionally, gray scale sensor, infrared electronic distance meter and high-resolution monitor are used to create enjoyment for users.
University of Electronic Science and Technology of China Zhongshan Institute