Terracotta cooking stand and casserole Stand from House XVII, 3rd c. BCE. IP 520. Casserole (λοπάδα) from House XV, c. 250-200 BCE. IP 539. From the Rachi settlement at Isthmia. Archaeological Museum of Isthmia, Greece.
Gravitational Water Vortex power plant produces electricity with only a .7 meter drop in height (but needs a minimum of 100 liters per second) - enough power for roughly 25 (European) households
The gravitation water vortex power plant is a type of micro hydro power plant which is capable of producing energy using a low hydraulic head of 0.7–3 metres (2 ft 4 in–9 ft 10 in). The technology is based on a round basin with a central drain. Above the drain the water forms a stable line vortex which drives a water turbine.
Булерьян своими руками - Построим дом и дачу сами
How To Grow 168 Plants In A 6 X 10 Space With A DIY A-Frame Hydroponic System:
Socket System Lumber Link | Builder Magazine | Products, Lumber, Building Technology, Electrical, Socket Systems.
Sistemas de soquete são Fácil como 1-2-3
Product - Ball Bearings for Lead Screws and Linear Motion