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Free-standing shelf frames are also usually manufactured from metal (usually steel), though the shelves may be made of wood. The metal frames may be formed of slotted angle - steel strips longitudinally pressed into a right-angle or L-shaped section (C- and box-section systems are also used where structures have to carry particularly heavy ...
Free-standing shelves can be accessible from either one or both longer length sides. A shelf with hidden internal brackets is termed a floating shelf. A shelf or case designed to hold books is a bookshelf. The length of the shelf is based upon the space limitations of its siting and the amount of weight which it will be expected to hold.
Each shelving unit is normally mounted on a level trackway (to eliminate gradients in the supporting floor), making it possible to move heavy units with minimal effort. Mobile shelving can be moved manually or by the use of electrical motors.
The leg is designed to fold and fit securely against the underside of the table top, while remaining attached. Because the hinge requires a stable material such as metal for dexterity, some producers use lightweight materials such as aluminium for an increased degree of portability in the folding mechanism.
Drawing up a comprehensive list of words in English is important as a reference when learning a language as it will show the equivalent words you need to learn in the other language to achieve fluency.
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