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A set of whippletrees or leader-bars for the two leaders of a four-horse team A whippletree , or whiffletree , [ 1 ] [ 2 ] is a mechanism to distribute force evenly through linkages . It is also referred to as an equalizer , leader bar , or double tree .
The central element is the equalising beam, on which a spring set (with an inner and an outer coil) rests at each end. Other components are, from left to right: an axlebox with roller bearing; a pair of swing links and short beam supporting a nest of coil springs and a vertical hydraulic motion damper; and a horizontal torsion bar.
The number of frequency channels may be matched to the requirements of the intended application. A car audio equalizer might have a total of five to ten frequency bands. An equalizer for professional live sound reinforcement typically has some 25 to 31 bands, for more precise control of feedback problems and equalization of room modes.
A tow hitch (or tow bar or trailer hitch in North America [1]) is a device attached to the chassis of a vehicle for towing, or a towbar to an aircraft nose gear. It can take the form of a tow ball to allow swiveling and articulation of a trailer , or a tow pin, or a tow hook with a trailer loop, often used for large or agricultural vehicles ...
The triple bar or tribar, ≡, is a symbol with multiple, context-dependent meanings indicating equivalence of two different things. Its main uses are in mathematics and logic. Its main uses are in mathematics and logic.
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