Hand-drawn fast design a3 paper 1:30 re-reading to draw how large

General drawing by 1:1, and then copy the graphic with the appropriate 1:1 standard frame, and will be 1:1 graphics in the frame, "according to the 1:30" requirements, the 1:1 standard frame magnified 30 times, which is to choose the appropriate 1:1 standard frame such as A0, A1, A2, A3, A4, in order to meet the 1: 30, out of the drawing printed on paper according to the choice of 1:1 standard drawing frame, you get 1:30 ratio of drawings. This is also CAD drawing different from the traditional drawing first to determine the proportion of the size of the drawing.