Определение base course в Английский Язык Английский Язык словарь
The layer, or layers of material of designed thickness placed on a subbase or a subgrade to support a surface course (4) See diagram
Continuous horizontal course that sets on the brick ledge It is the first course set in a wall
The layer in the pavement system immediately below the binder and surface courses It usually consists of crushed stone, although it may consist of crushed slag or other stabilized or unstabilized material