compression screw
51Spondylolisthesis — Spondylolisthésis La spondylolisthésis est le glissement d une vertèbre en avant du vertèbre située en dessous d elle. Les vertèbres les plus souvent concernés sont la quatrième et la cinquième vertèbre lombaire. Sommaire 1 Spondylolyse et… …
52Spondylolisthésis — Le spondylolisthésis est le glissement d une vertèbre en avant de la vertèbre située en dessous d elle. Les vertèbres les plus souvent concernées sont la quatrième et la cinquième vertèbre lombaire. Sommaire 1 Spondylolyse et spondylolisthésis… …
53Moto Guzzi California — The Moto Guzzi California (aka Cali) is a motorcycle manufactured by Italian company Moto Guzzi since 1971, bringing together the company s heritage, their iconic air cooled 90° V twin engines and styling that evokes the classic American Cruiser… …
54Corrugated box design — High graphics overlap box: die cut for plastic handle and locking tabs Corrugated box design is the process of matching design factors for corrugated fiberboard boxes with the functional physical, processing and end use requirements. Packaging… …
55Plastic moulding — In Plastic moulding, the moulding process selected depends upon two main factors: The geometry of the component to be moulded and the material from which it is to be made. There are two main groups of plastic moulding materials: Thermoplastic… …
56History of perpetual motion machines — The history of perpetual motion machines dates back to the Middle Ages. For millennia, it was not clear whether perpetual motion devices were possible or not, but the development of modern thermodynamics has indicated that they are impossible.… …
57Paintball marker — A paintball marker, also known as a paintball gun, is the central or main piece of equipment in the sport of paintball. Markers make use of an expanding gas such as carbon dioxide, compressed air or nitrogen dioxide to propel paintballs through… …
58Electrical conduit — risers, seen inside fire resistance rated shaft, as seen entering bottom of a firestop. The firestop is made of firestop mortar on top, rockwool on the bottom. Raceways are used to protect cables from damage …
59Steam engine — A steam engine is a heat engine that performs mechanical work using steam as its working fluid. [ [http://www.britannica.com/EBchecked/topic/564472/steam engine steam engine Britannica Online Encyclopedia ] ] Steam engines have a long history,… …
60Centrifugal compressor — Centrifugal compressors, sometimes termed radial compressors, are a sub class of dynamic axisymmetric work absorbing turbomachinery.[1] Centrifugal impeller with a highly polished surface likely to improve performance …
