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Third rail print that page

WMATA_third_rail_at_West_Falls_Church

insulated brackets, typically at intervals of 10 feet (3.0 metres) or so. The trains have metal contact blocks called "shoes" which make contact with the conductor rail. The traction current is returned to the generating station through the running rails. The conductor rail is usually made

Videoconferencing print that page

Tandberg_Image_Gallery_-_telepresence-t3-side-view-hires

A videoconference or video conference (also known as a videoteleconference ) is a set of interactive telecommunication technologies which allow two or more locations to interact via two-way video and audio transmissions simultaneously. It has also been called 'visual collaboration' and

Tire print that page

Car_tires

performance by providing a flexible cushion that absorbs shock while keeping the wheel in close contact with the ground. The word itself may be derived from the word "tie," which refers to the outer steel ring part of a wooden cart wheel that ties the wood segments together (see Etymology

Sperm donation print that page

fertility clinic , or at home. Home donations are done using sperm from a known donor, or from a contact through a classified advert or sperm donation forum or website. [ citation needed ] Pregnancies are usually achieved using donated sperm by artificial insemination (either by ICI or

wikipedia.org | 2011/9/30 18:17:52

The Culture print that page

variants include M8 through M16, which are encrypted by various degrees, and are typically used by the Contact Section. Higher level encryptions exist, the highest of these being M32. M32 and lower level encrypted signals are the province of Special Circumstances. Use of M32 is reserved for

wikipedia.org | 2011/8/28 10:51:26

Lake Burley Griffin print that page

Lake_Burley_Griffin_Canberra-MJC02

Griffin designed the lake with many geometric motifs, so that the axes of his design lined up with natural geographical landmarks in the area. However, government authorities changed his original plans and no substantial work was completed before he left Australia in 1920. His scheme remained

Heat sink print that page

AMD_heatsink_and_fan

light emitting diodes (LEDs). A heat sink is physically designed to increase the surface area in contact with the cooling fluid surrounding it, such as the air. Approach air velocity, choice of material, fin (or other protrusion) design and surface treatment are some of the design factors

Disc brake print that page

Disk_brake_dsc03682

The disc brake or disk brake is a device for slowing or stopping the rotation of a wheel while it is in motion. A brake disc (or rotor in American English) is usually made of cast iron , but may in some cases be made of composites such as reinforced carbon–carbon or ceramic matrix composites

Railway electrification system print that page

Three_engines_of_type_Rc4

Disadvantages 5.1.3 Trade-offs 5.1.4 Summary 5.2 Energy efficiency 5.3 External cost 6 Non contact systems 7 Research and development 8 See also 9 References 10 Sources 11 External links [ edit ] Characteristics of electric traction The main advantage of electric

Rotary Youth Exchange print that page

Indonesian_Rotary_Youth_exchange_students

Rotary Club that hosts a student provides a Rotarian counselor for the student who is the student's contact person within the club and provides support to the student when needed. Some districts are very active and host and send many students, other districts are less active and host fewer