ألمانية - الإنجليزية
تعريف untere tragschicht في ألمانية الإنجليزية القاموس.
- sub-base
- A secondary additional base fitted under the base of the router This may be introduced to increase bearing surface, or provide a means of guiding the router in various ways
- A layer of material on the sub-grade that provides a foundation for a pavement surface