Drainage channel grate

Bottom part of a commercial building drainage channel

Window for a commercial building drainage channel

Upper part of a house drainage channel

Block retaining wall of a villa

Drain channel to the basement with large window

Large drain channel with a waterproof base and sidewalk grid

Retaining wall with high window

Plan and section of a basement wall

Retaining wall with pad footing foundation

Basement retaining wall

Basement retaining wall underneath the city square