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。
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Draughting instruments with or without graduation . part 3 : set squares 带刻度或不带刻度的绘图仪器.第3部分:三角板
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Triangles for chart work 海图作业三角板
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Towing delta plate 拖航用三角板
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Through research , we put forward the techniques of the circle and triangle object recovery and make them as the modules so that they can be easily transplanted 通过研究我们提出了平板圆复原和三角板复原技术，并将它们模块化，使之具有较强的可移植性。
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Sinusoidal profile and triangular profile are chosen as the bottom profile , and the undulated profile varies periodically . newtonian fluid and non - newtonian fluid are considered in each flow model 选取两种波形底板模型:一种为正弦板基面;另一种为三角板基面,其轮廓曲线分别为周期变化的正弦和三角形曲线。
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