Blocks with installations for fires for public roads.

Block with descriptive details of septic tank and absorption well.

Hydraulic connections in sight and cut, 1.

Hydraulic connections in sight and cut, 2.

Hydraulic connections in sight and cut, 3.

Hydraulic connections in sight and cut, 4.

Hydraulic connections in sight and cut, 5.

Architectural design of masonry, 1 of 2.

Water and sewage project in masonry, 2 of 2.

Library of symbols on canals in general in 166 blocks.