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HOLE SIZE SHAPE [7 records]

Record 1 2024-07-18

English

Subject field(s)
  • Wind Instruments
CONT

[One] type of flute is a globular flute, also called a vessel flute. "Ocarina" is a common name for one of the most common types of globular flutes. Unlike their tubular flute cousins, globular flutes can be any shape, but still have finger holes and a blow hole, and are played in generally the same fashion as a tubular flute.... The physics of sound production is significantly different between tubular and globular instruments. In a tubular instrument, a vibrating column of air produces the sound. The length of this air column is the primary factor determining the pitch. However, the pitch can be modified by uncovering toneholes along the body of the instrument, which effectively shorten the length of the air column and raise the pitch. But with globular instruments, the shape of the air contained within the vessel is generally irrelevant to the pitch. It's the total volume of air contained in the vessel and the size of the opening that determines the pitch.

French

Domaine(s)
  • Instruments de musique à vent

Spanish

Save record 1

Record 2 2023-08-03

English

Subject field(s)
  • Optical Instruments
  • Medical and Surgical Equipment
CONT

Aperture diaphragm : is the simplest type of beam restricting device. It consists of a sheet of lead with a hole in the center that determines the size and shape of the beam and attaches directly to the x-ray tube.

French

Domaine(s)
  • Instruments d'optique
  • Équipement médico-chirurgical

Spanish

Campo(s) temático(s)
  • Instrumentos ópticos
  • Equipo médico y quirúrgico
Save record 2

Record 3 2010-06-30

English

Subject field(s)
  • Energy Transformation
  • Nuclear Fission Reactors
CONT

The shape and size of the pellets differs for different reactors but in the U. K. there are only 2 different designs. Solid pellets are used in most PWRs [pressurized water reactor] and annular pellets are used in AGRs [advanced gas reactor]. Annular pellets have a cylindrical hole running through the centre of the pellet and thus require a retractable pin in the press. The purpose of this hole is to accommodate distortions in the fuel and fission gasses formed in the reactor. Once the pellets have been pressed, they are sintered at 1750°C in a reducing atmosphere of hydrogen or a mixture of hydrogen and nitrogen...

French

Domaine(s)
  • Transformation de l'énergie
  • Réacteurs nucléaires de fission
CONT

[Conception des combustibles REP] Les pastilles [...] représentent la partie active du combustible. Ce sont des petits cylindres - diamètre variant selon les conceptions de 8 à 10 mm et hauteur de 10 à 15 mm - obtenus par pressage et frittage de poudre d'oxyde d'uranium UO2 [...] Ces pastilles sont généralement pleines, sauf dans les réacteurs VVER où elles peuvent comporter un trou central (pastilles annulaires).

Spanish

Save record 3

Record 4 2001-03-16

English

Subject field(s)
  • Telecommunications Facilities
DEF

Large log used as an anchor for a beach anchor or pole stay.

DEF

A wooden, concrete, or metal bar buried in the earth to hold a guy rope firmly.

CONT

Some years ago guy wires were attached to sections of poles buried in the ground as anchors.... However, because of the large amount of soil that has to be handled in preparing the proper size and shape of hole to place a log anchor, the installed cost of these anchors is greater than the installed cost of a commercial anchor.

French

Domaine(s)
  • Installations de télécommunications
OBS

billot. Bois en grume, tronçon de bois non équarri; bille [...]

OBS

La plaque d'ancrage doit avoir un diamètre de 20 cm pour un boulonnage simple [...]

OBS

Si la structure n'est pas en bois, on peut parler plus généralement de «dispositif d'ancrage».

Spanish

Save record 4

Record 5 1997-11-25

English

Subject field(s)
  • Fluid Mechanics and Hydraulics (Physics)
  • Effects of Pollution
CONT

TANK CAR WITH PUNCTURE HOLE IN BOTTOM. The rate of outflow from a puncture hole in the bottom of the tank car is... a function of the hole size and shape, the height of the fluid above the puncture hole and a coefficient of discharge.

French

Domaine(s)
  • Mécanique des fluides et hydraulique (Physique)
  • Effets de la pollution
CONT

WAGON-CITERNE PERCÉ DANS LE BAS. On suppose que le wagon-citerne [...] contient 80 000 litres de liquide et qu'il est plein au moment du bris. Le volume de liquide restant, après un temps d'écoulement donné (t), n'est pas seulement fonction du débit de fuite, mais aussi de la taille et de la forme du wagon-citerne.

OBS

Enviroguide Acide sulfurique, 5.2.1. Voir : rate of discharge (terme utilisé dans Britannica).

Spanish

Save record 5

Record 6 1987-11-04

English

Subject field(s)
  • Precision Grinding
CONT

Diamond-charged mandrels are used instead of conventional grinding wheels for grindings holes less than 3/16" or 1/4" in diameter. These mandrels should be made for cold-rolled steel which has been turned to the correct size and shape in relation to the hole to be ground. The grinding end of the mandrel is placed in diamond dust and is tapped sharply with a small hardened hammer to embed the diamond dust in the mandrel surface.

French

Domaine(s)
  • Rectification (Usinage)

Spanish

Save record 6

Record 7 1985-09-09

English

Subject field(s)
  • Hydrology and Hydrography
  • Fluid Mechanics and Hydraulics (Physics)

French

Domaine(s)
  • Hydrologie et hydrographie
  • Mécanique des fluides et hydraulique (Physique)
OBS

Enviroguide Acide sulfurique, chap. 5.2.1 AUTEC.

OBS

Selon le Britannica, syn. de cross sectional area.

Spanish

Save record 7

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