ventilating rate
51SMS Von der Tann — SMS stands for Seiner Majestät Schiff , or His Majesty s Ship in German.] was the first battlecruiser built for the German Kaiserliche Marine, as well as Germany s first major turbine powered warship. At the time of her construction, Von der Tann …
52Heating degree day — United States Heating Degree Day map, 1961 1990 …
53Solar air conditioning — refers to any air conditioning (cooling) system that uses solar power. This can be done through passive solar, photovoltaic conversion (sun to electricity), or solar thermal energy conversion. The U.S. Energy Independence and Security Act of… …
54Council House 2 — (CH2) General information Type Office Location Melbourne, Australia …
55Mechanical fan — Household electric box fan with a propeller style blade A mechanical fan is a machine used to create flow within a fluid, typically a gas such as air. A fan consists of a rotating arrangement of vanes or blades which act on the air. Usually, it… …
56Maginot Line — Ligne Maginot Part of Maginot Line Eastern France …
57Boiler — For the Limp Bizkit song, see Boiler (song). A portable boiler (preserved, Poland) …
58Stirling engine — Alpha type Stirling engine. There are two cylinders. The expansion cylinder (red) is maintained at a high temperature while the compression cylinder (blue) is cooled. The passage between the two cylinders contains the regenerator …
59Ambassador Bridge — from the Canadian side of the Detroit River Official name Ambassador Bridge Carries …
60Mercury switch — A Single Pole, Single Throw (SPST) mercury switch on millimetre graph paper …
