NF P98-531-法文
永久性道路垂直交通标志 - 交通标志及其支撑结构的主要尺寸 - 数值和尺寸公差
Permanent road traffic signs — Principal dimensions of traffic signs and supports — Values and dimensional tolerances
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Permanent road traffic signs — Principal dimensions of traffic signs and supports — Values and dimensional tolerances
General Technical Specifications for Public Works Contracts - Underground Works
ISO-metric trapezoidal screw threads; Tolerances for trapezoidal screw threads of general purpose