Roman inventions Laszip Gábor

2. A concrete dam that is curved upstream in plan
5. A chemical substance used for construction that sets, hardens, and adheres to other materials to bind them together
7. The first portable calculating device
9. Thin slices of wood and sometimes bark that typically are glued onto core panels
10. A farm tool for loosening or turning the soil before sowing seed
13. An underground pipe or tunnel system for transporting sewage
14. People can walk trought this if they need to get across a river
15. A method of carving

1. A composite material composed of aggregate bonded together with a fluid cement
3. A curved vertical structure with an open space underneath it
4. An open-air venue used for entertainment, performances, and sports
6. An architectural element similar to the hollow upper half of a sphere
8. A heat engine that performs mechanical work using steam as its working fluid
11. A type of pipe organ blown by air, where the power source pushing the air is derived by water from a natural source
12. An instrument used for measuring density