玻璃珠选形器
Verification Regulation for Shape Selector of Glass Beads
2007-04-03
AASHTO PP 74-19
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
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