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Standard Practice for Standard Practice for Determination of Size and Shape of Glass Beads Used in Traffic Markings by Means of Computerized Optical Method 用计算机光学方法测定交通标志用玻璃珠尺寸和形状的标准实施规程
AASHTO R 98-20描述了使用计算机光学设备测量交通标线中使用的半透明玻璃珠的尺寸和形状。本规程适用于直径为0.15 mm至2.35 mm的玻璃微珠。
AASHTO R 98-20 describes measuring size and shape of translucent glass beads used in traffic markings with computerized optical equipment. This practice is intended for glass beads from 0.15 mm to 2.35 mm in diameter.
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