shell ventilation
21Motorcycle helmet — A collection of motorcycle helmets worn by Moto GP racer Valentino Rossi A motorcycle helmet is a type of protective headgear used by motorcycle riders. The primary goal of a motorcycle helmet is motorcycle safety to protect the rider s head… …
22Oxygen — This article is about the chemical element and its most stable form, O2 or dioxygen. For other forms of this element, see Allotropes of oxygen. For other uses, see Oxygen (disambiguation). nitrogen ← oxygen → fluorine ↑ O ↓ …
23Abalone — For board game, see Abalone (board game). Abelone redirects here. For the wine grape that is also known as Abelone, see Chasselas. Abalone Living abalone in tank showing epipodium and tentacles, anterior end to the right …
24Earth sheltering — is the architectural practice of using earth against building walls for external thermal mass, to reduce heat loss, and to easily maintain a steady indoor air temperature. Earth sheltering is popular in modern times among advocates of passive… …
25Heat exchanger — An interchangeable plate heat exchanger Tubular heat exchan …
26HMS Hood (51) — HMS Hood (pennant number 51) was a battlecruiser of the Royal Navy, and considered the pride of the Royal Navy in the interwar period and during the early period of World War II. She was one of four Admiral class battlecruisers ordered in mid… …
27Negative pressure ventilator — This article is about the medical device. For the band, see Iron Lung (band). Negative pressure ventilator Intervention An Emerson iron lung. The patient lies within the chamber, which when sealed provides an effectively oscillating atmospheric… …
28Rhinoplasty — For the album by Primus, see Rhinoplasty (album). Rhinoplasty Intervention Rhinoplasty: The lower lateral cartilage (greater alar cartilage) exposed for plastic modification via the left nostril …
29Pontiac Catalina — Infobox Automobile name = Pontiac Catalina aka = Pontiac Laurentian manufacturer = General Motors production = 1950 1981 assembly = Pontiac, Michigan Oshawa, Ontario, Canada (Laurentian) predecessor = Pontiac Chieftain successor = Pontiac… …
30Gas holder — A gasometer, or gas holder, is a large container where natural gas or town gas is stored near atmospheric pressure at ambient temperatures. The volume of the container follows the quantity of stored gas, with pressure coming from the weight of a… …
