vertical through ventilation
21Door — For other uses, see Door (disambiguation). A door is a movable structure used to open and close off an entrance, typically consisting of a panel that swings on hinges or that slides or rotates inside of a space. When open, they admit ventilation… …
22Western architecture — Introduction history of Western architecture from prehistoric Mediterranean cultures to the present. The history of Western architecture is marked by a series of new solutions to structural problems. During the period from the… …
23Liberty Tunnel — Infobox Bridge bridge name= Liberty Tunnels caption= Traffic flowing through the Liberty Tunnels official name= also known as= Liberty Tubes carries= 4 lanes of roadway crosses= locale= Pittsburgh, Pennsylvania;Mt. Washnigton maint= id= design=… …
24Glossary of firefighting — Note: This list does not include firefighting equipment, i.e., tools and apparatus used by firefighters. Please refer to Glossary of firefighting equipment for such terms. : Note: This list is incomplete. You can help Wikipedia by… …
25respiration, human — ▪ physiology Introduction the process by which oxygen is taken up and carbon dioxide discharged. The design of the respiratory system The human gas exchanging organ, the lung, is located in the thorax, where its delicate tissues are… …
26Solar energy — is the light and radiant heat from the Sun that powers Earth s climate and weather and sustains life. Since ancient times it has been harnessed for human use through a range of technologies. Solar radiation along with secondary solar resources… …
27Tracheotomy — This article is about the surgical procedure called a tracheotomy. For a similar procedure, see Cricothyrotomy. Tracheotomy Intervention Completed tracheotomy: 1 Vocal folds 2 Thyroid cartilage 3 Cricoid cartilage 4 Tracheal rings …
28Chevrolet Vega — 1972 Chevrolet Vega GT Hatchback Coupe Manufacturer Chevrolet Division of General Motors Also called Vega 2300 …
29Firefighter — Firefighters are rescuers extensively trained primarily to put out hazardous fires that threaten civilian populations and property to rescue people from car accidents, collapsed and burning buildings and other such situations. The increasing… …
30Adit — Gated entrance of an abandoned adit near Medford, Oregon, USA …
