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An overhaul hook ball, also known as an overhaul ball or headache ball, is a heavy weight that is attached to the end of a crane's cable, above the lifting hook. It ...
Herpa Miniaturmodelle GMBH (or simply Herpa, an acronym for "Hergenröther und Patente”, the original name of the firm), is a German manufacturing company that produces die-cast scale model aircraft (under the "Herpa Wings" trademark) and plastic model cars and trucks under the "Herpa Cars & Trucks" trademark. The mainstay of the Herpa Wings ...
Rack with sample component sizes including an A/V half-rack unit. A rack unit (abbreviated U or RU) is a unit of measure defined as 1 + 3 ⁄ 4 inches (44.45 mm). [1] [2] It is most frequently used as a measurement of the overall height of 19-inch and 23-inch rack frames, as well as the height of equipment that mounts in these frames, whereby the height of the frame or equipment is expressed ...
Herpa Wings is a brand that identifies the die-cast model aircraft line of German company Herpa. The collection includes 250 airlines under 17 different aircraft manufacturers in 1:200 scale. The mainstay of Herpa Wings is in the 1:500 scale, while model airliners are also produced in the 1:
A rack and pinion has roughly the same purpose as a worm gear with a rack replacing the gear, in that both convert torque to linear force. However the rack and pinion generally provides higher linear speed — since a full turn of the pinion displaces the rack by an amount equal to the pinion's pitch circle whereas a full rotation of the worm screw only displaces the rack by one tooth width.
A headache, also known as cephalalgia, is the symptom of pain in the face, head, or neck. It can occur as a migraine, tension-type headache, or cluster headache. [1] [2] There is an increased risk of depression in those with severe headaches. [3] Headaches can occur as a result of many conditions.
The ETSI rack is defined by the European Telecommunications Standards Institute (ETS 300 119). The distance of the right edge of the right mounting rail to the left edge of the left mounting rail is 535 millimetres (21.1 in). As 535 mm is very close to 21 inches, these racks are sometimes called 21-inch racks. The gap between the posts is 500 ...
Valproate (valproic acid, VPA, sodium valproate, and valproate semisodium forms) are medications primarily used to treat epilepsy and bipolar disorder and prevent migraine headaches. [7] They are useful for the prevention of seizures in those with absence seizures , partial seizures , and generalized seizures . [ 7 ]