“wearing course”可以造什么句，wearing course造句

Base course [highways]: The part of a road structure Below the wearing course and above the road Base.

Description: Loss of discrete areas of the wearing course layer. There is usually a clear delineation of the wearing course asphalt and the layer below.

From my observation as a building contractor, the 'wearing course 'of the new road surface could be TOO FINE or TOO SMOOTH and TOTALLYUNSUITABLE for highway use!