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The "10" is the ball diameter in millimeters. The "3000" is the force in kilograms force. The hardness may also be shown as XXX HB YYD 2. The XXX is the force to apply (in kgf) on a material of type YY (5 for aluminum alloys, 10 for copper alloys, 30 for steels). Thus a typical steel hardness could be written: 250 HB 30D 2. It could be a ...
A test takes a mere 2 seconds and, using the standard probe D, leaves an indentation of just ~0.5 mm in diameter on steel or steel casting with a Leeb hardness of 600 HLD. By comparison, a Brinell indentation on the same material is ~3 mm (hardness value ~400 HBW 10/3000), with a standard-compliant measuring time of ~15 seconds plus the time ...
The Handbook of the Birds of the World ( HBW) is a multi-volume series produced by the Spanish publishing house Lynx Edicions in partnership with BirdLife International. It is the first handbook to cover every known living species of bird. The series was edited by Josep del Hoyo, Andrew Elliott, Jordi Sargatal and David A. Christie .
The HBW and BirdLife International Illustrated Checklist of the Birds of the World is a checklist of the birds of the world published by Lynx Edicions in association with BirdLife International in two volumes in 2014 and 2016.
The H-B Woodlawn Secondary Program, commonly referred to as H-B, or HBW, is a democratic alternative all-county public school located in Arlington County, Virginia, based on the liberal educational movements of the 1960s and 1970s.
The dark-winged trumpeter is a chicken-like bird with a long neck and legs and a hump-backed profile. It is 45 to 52 centimetres (18 to 20 in) long. The sexes are alike. Their bill color ranges from dusky brown to bright green and their legs and feet are dusky brown to greenish olive. Adults of the nominate subspecies are mostly velvety ...
The cinnamon-sided hummingbird is 10 to 11.5 cm (3.9 to 4.5 in) long and weighs about 6.3 g (0.22 oz). Both sexes have a red bill with a black tip. Adult males have a glittering bluish green crown, an emerald to bronze green nape and back, and grayish brown to bronze rump and uppertail coverts. Their tail is coppery to purplish with bronze ...
ATSF 3000 class 2-10-10-2. The forward section of the boiler is a primitive superheater and feedwater heater. In 1911 and 1912, the Atchison, Topeka and Santa Fe Railway modified ten 2-10-2 Baldwin -built locomotives into a new 2-10-10-2 configuration dubbed the 3000 class. They were the largest locomotives in the world from their introduction ...