photo: Creative Commons / David Monniaux
Tread drive sprocket of the Leclerc main battle tank (2006).
photo: Creative Commons / MathKnight
CAT D9L, the first D9 model to employ the "high drive" configuration.
photo: Creative Commons / Kc2olb
Bike sprocket
photo: Creative Commons / Liftarn
A bicycle with shaft drive instead of a chain.(一个具有轴传动链,而不是一个自行车)
photo: European Community / Atlant
IMAX uses a stronger "ESTAR" (Kodak's trade name for PET film) base.
photo: Creative Commons / Stahlkocher
Cutaway view of a Husqvarna Novo coaster brake hub.(剖视图的Husqvarna的诺过山车刹车毂)
photo: Creative Commons / Kurmis
Derny Taon 125, 1955/56.
photo: Creative Commons / Atlant
Xenon IMAX 1.
photo: Creative Commons / John Reaves
An 18 tooth cog that attaches to the rear hub of fixed-gear bike.(一个18齿的齿轮,重视固定齿轮自行车后花鼓)
photo: Creative Commons / Gregorydavid
An old manual crane with a pivoted boom. The incline of the boom is controlled by means of chains, sprockets and gears.
photo: Creative Commons / Raul654
M55 howitzer
photo: Creative Commons / Hohoho
The rear of the hull with the spherical firing port.
photo: Creative Commons / High Contrast
T-62. Notice the two optional 200 liter drum-type fuel tanks.
photo: US Navy / U.S. Navy photo by Mass Communication Specialist 3rd Class Matthew Bookwalter
Boatswain's Mate 3rd Class Ryan Cash polishes the brass of a wildcat on the foc'sle of the guided-missile cruiser USS Hue City (CG 66).
photo: Creative Commons / Bilou
Side view of a T-62. The tank in the picture has either damaged or disassembled torsion bars and its hull lies on the ground.
photo: Creative Commons / TUBS
Vierständerhof in Ravensberg Land. The distance between the 2 central rows of uprights roughly defines the width of the Deele. To either side, between the central and outer posts are the stalls. The living accommodation is at the back of the Deele. Above the Deele is an attic (Lagerboden).
photo: Creative Commons / Huhu Uet
Jawa Speedway Machine with 500 cc engine. Speedway uses a unique type of motorcycle, governed by the FIM's "Track Racing Technical Rules".
photo: Creative Commons
An escalator being repaired at Town Hall Station in Sydney, Australia.
photo: Public Domain / Stratosphere
Millennium Force
photo: Creative Commons / Needoptic
2004 BMW 330CI Silver Grey Metallic
photo: Creative Commons / Sfoskett
The 1967 Toronado's 425 cubic-inch Super Rocket V8 engine
photo: Creative Commons / Signaleer
A U.S. Army Special Forces soldier holds familiarization training on the MK-44 Mini Gun during Operation Iraqi Freedom.
photo: Creative Commons
Plaque on Vancouver Gastown steam clock(1)
photo: Creative Commons / File Upload Bot (Magnus Manske)
140 CID (2.3 L) 1 bbl. I-4, 90 hp
photo: Creative Commons
Steam engine
photo: Creative Commons / Timo Beil
A compact hydraulic excavator or mini excavator is a tracked or wheeled vehicle with an approximate operating weight from 0.7 to 7.5 tonnes. It generally includes a standard backfill blade and features independent boom swing. The compact hydraulic excavator is also referred to as a mini excavator. The compact hydraulic excavator is somewhat different from other construction equipment in that all movement and functions of the machine are accomplished through the transfer of hydraulic fluid. The c
photo: Creative Commons / Springfieldohio
Scottsboro is a city in Jackson County, Alabama, United States, and is included in the Huntsville-Decatur Combined Statistical Area. As of the 2000 census, the population of the city is 14,762. Named for its founder Robert Scott, the city is the county seat of Jackson County.