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A A-grade Also aid climbing grade. The technical difficulty grading system for aid climbing (both for "original" and an adapted version for "new wave"), which goes: A0, A1, A2, A3, A4, A5 and up to A6 (for "new wave"). See C-grade. Abalakov thread Abalakov thread Also V-thread. A type of anchor used in abseiling especially in winter and in ice climbing. ABD Also assisted braking device. A term ...
A face gear set typically consists of a disk-shaped gear, grooved on at least one face, in combination with a spur, helical, or conical pinion. A face gear has a planar pitch surface and a planar root surface, both of which are perpendicular to the axis of rotation. [ 1 ]
Zamperini Field (IATA: TOA, ICAO: KTOA, FAA LID: TOA) is a public airport three miles (5 km) southwest of downtown Torrance, in Los Angeles County, California, United States. [ 1 ] The airport is classified by the FAA as a Regional Reliever [ 2 ] and was once known as Torrance Municipal Airport ; it was renamed for local sports and war hero ...
Pressure angles. Pressure angle in relation to gear teeth, also known as the angle of obliquity, [1] is the angle between the tooth face and the gear wheel tangent. It is more precisely the angle at a pitch point between the line of pressure (which is normal to the tooth surface) and the plane tangent to the pitch surface.
ACS 1: Airman Certification Standards [4] FAA pilot testing ACS 2: Audio control system ACU 1: Air condition unit ACU 2: Alternator control unit [2] Protection from alternator over-voltage. AD Airworthiness Directive: ADA Advisory area ADAHRS Air data attitude heading reference system ADC Air data computer: ADD Acceptable deferred defect ADF ...
When stocking, a tree's basal area is measured. The basal area is a cross-sectional area of the stump taken about 4.5 feet (1.4 m) above the ground. [7] The equation for calculating the basal area of trees in a stand is Basal Area = 0.005454 DBH 2, where DBH is the diameter of the tree at the aforementioned measuring height. [7]
TOA, a mnemonic in trigonometry; TOA, the SAME code for a tornado watch; Toas, Aboriginal artifacts; Tubo-ovarian abscess, an infection of the ovary and fallopian tube; Type of Activity, a classification defined in the Australian and New Zealand Standard Research Classification; Trioctylamine, an organic compound
A pair of well-worn steel-toe shoes A pair of ISO 20345:2004 compliant S3 safety boots. A steel-toe boot (also known as a safety boot, steel-capped boot, steel toecaps or safety shoe) is a durable boot or shoe that has a protective reinforcement in the toe which protects the foot from falling objects or compression.