Answer:
Windlass (2)
Technology they used to bring the spoils in from the tunnels out. It was set up at the shaft that connected to the tunnel and work as a pulley to bring the spoils up.
Passive Cooling systems (Wind catcher) (2)
Technology used to cool down the wind by circulate wind through a building.
Rings (2)
Technology used to reinforce in tunnels that that were a easy to collapse because of loose soil. It made by burnt clay, mineral, salt. Also helps when they cleaning and fixing.