Draughtsmen make drawing on a drawing board, using a pencil and a t-square, set square and scale . 绘图员用铅笔、丁字尺、三角板和比例尺在绘图板上绘图。
2.
Drawing ruler - t - square 绘图仪尺.丁字尺
3.
Ustable head t - square 活动头丁字尺
4.
Ustable head t square 活头丁字尺
5.
Cad have already replaced the t - square and drawing board and become to design the main tool of the personnel along with the cad technique development , and consumedly lower the labor strength of the design personnel , and increase the work efficiency of the design personnel 随着cad技术的发展， cad已经代替丁字尺和图板成为设计人员的主要工具，大大降低了设计人员的劳动强度，提高了设计人员的工作效率。
