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Road surface one-way traffic sign - has plastics-coated triangularly ridged base, opposite sides of triangles showing different signs
Road surface one-way traffic sign - has plastics-coated triangularly ridged base, opposite sides of triangles showing different signs
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机译:路面单向交通标志-具有塑料涂层的三角形脊底,三角形的相对侧显示不同的标志
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摘要
The signboard, e.g. traffic sign, comprises a base of which the upper surface is provided with parallel triangular-section grooves. The (45 deg.) isosceles sides of the triangular-section ridges so formed carry the signs, e.g. all left hand sides one sign and all right hand sides another sign. - This surface is coated with transparent plastics, the total thickness of the board not exceeding 5 mm. The observer sees one or the other sign depending on the angle of view.
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