double-threaded screw
31Derailleur gears — Transmission types Manual Sequential manual Non synchronous Preselector Automatic Manumatic Semi automatic Electrohydraulic Dual …
32Lock (water transport) — Canal lock and lock keeper s cottage on the Aylesbury Arm of the Grand Union Canal at Marsworth in Hertfordshire, England …
33Bicycle brake systems — are used to slow down, or brake a bicycle. There have been various types through history, and several are still in use today.HistoryEarly bicycles such as the high wheeled penny farthing bikes were fitted with spoon brakes. As they were fixed… …
34Padlock — For other uses, see Padlock (disambiguation). Padlock Padlocks are portable locks used to protect against theft, vandalism, sabotage, unauthorized use, and harm. They are designed to protect against some degree of forced and surreptitious entry …
35CA 36C — The CA 36c is an electric Airsoft gun (AEG) made by Classic Army. Stock Specifications RRP 238USD Specs EG1000 motor470rnd mag7 mm bearings Weight 2750g Length Folded: 500 mmUnfolded: 718 mm Capacity 470rnd Features/options: Taking a look at the… …
36Pendulum — This article is about pendulums. For other uses, see Pendulum (disambiguation). Simple gravity pendulum model assumes no friction or air resistance …
37Épée — The épée (IPA| ep.eɪ) is the modern derivative of the original duelling sword, the rapier, used in sport fencing. Épée is French for sword .The weapon is similar to a foil (compared to a sabre), but has a stiffer blade that is V shaped in cross… …
38Model aircraft — A die cast Boeing 747 400 model. Model aircraft are flying or non flying models of existing or imaginary aircraft using a variety of materials including plastic, diecast metal, polystyrene, balsa wood, foam and fibreglass. Flying designs range… …
39photography, technology of — Introduction equipment, techniques, and processes used in the production of photographs. The most widely used photographic process is the black and white negative–positive system (Figure 1 >). In the camera the lens projects an image of… …
40Seal (emblem) — Present day impression of a Late Bronze Age seal …
