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Medium-density fibreboard. Medium-density fibreboard ( MDF) is an engineered wood product made by breaking down hardwood or softwood residuals into wood fibre, often in a defibrator, combining it with wax and a resin binder, and forming it into panels by applying high temperature and pressure. [1] MDF is generally denser than plywood.
In telecommunications, a distribution frame is a passive device which terminates cables, allowing arbitrary interconnections to be made. For example, the Main Distribution Frame (MDF) located at a telephone central office terminates the cables leading to subscribers on the one hand, and cables leading to active equipment (such as DSLAMs and ...
Laminated veneer lumber (LVL) is an engineered wood product that uses multiple layers of thin wood assembled with adhesives. It is typically used for headers, beams, rimboard, and edge-forming material. LVL offers several advantages over typical milled lumber: Made in a factory under controlled specifications, it is stronger, straighter, and ...
Engineered wood. Engineered wood, also called mass timber, composite wood, human-made wood, or manufactured board, includes a range of derivative wood products which are manufactured by binding or fixing the strands, particles, fibres, or veneers or boards of wood, together with adhesives, or other methods of fixation [1] to form composite ...
Main distribution frame. Small, single-sided MDF for a military base, 1940s. Modern main distribution frame. In telephony, a main distribution frame ( MDF or main frame) is a signal distribution frame for connecting equipment ( inside plant) to cables and subscriber carrier equipment ( outside plant ).
Description. Hardboard is similar to particle board and medium-density fiberboard, but is denser and much stronger and harder because it is made out of exploded wood fibers that have been highly compressed. [3] Consequently, the density of hardboard is 500 kg/m 3 (31 lb/cu ft) or more [4] and is usually about 800–1,040 kg/m 3 (50–65 lb/cu ...
The M-form, or multi-divisional form, originated in the early 20th century, and was most quickly adopted and taken advantage of in the US. While it was first utilized in specific industries like the petroleum and some technology companies in the 1950s, by the 1960s many large American companies had already implemented the M-form.
CD-ROM drives are rated with a speed factor relative to music CDs. If a CD-ROM is read at the same rotational speed as an audio CD, the data transfer rate is 150 Kbyte/s, commonly called "1×" (with constant linear velocity, short "CLV"). At this data rate, the track moves along under the laser spot at about 1.2 m/s.