ruggedness number

例句：

1. 1. The engineer used a roughness number to measure the surface roughness of the material.
   工程师使用粗糙度数值来测量材料的表面粗糙度。
2. 2. The construction company used a roughness number to ensure that the work was done to the required standards.
   建筑公司使用粗糙度数值以确保工作达到所需的标准。
3. 3. The car manufacturer used a roughness number to determine the quality of the tires before they were installed.
   汽车制造商使用粗糙度数值来确定轮胎安装前的质量和性能。