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A method by which an ultrasonic search unit scans a test piece in direct contact with a thin layer of couplant for transmission between the search unit and entry surface.



Related Terms

COUPLANT

A substance such as water, oil, grease, or paste used to avoid the retarding of sound transmission by air between the transducer and the test piece during ultrasonic examination.

PHONOGRAPH

[ENG ACOUS] An instrument for recording or reproducing acoustical signals, such as voice or music, by transmission of vibrations from or to a stylus that is in contact with a groove in a rotating disk.

ASSIZE

  1. A cylindrical block of stone forming one unit in a column. 2. A layer of stonework.

EXHAUSTION REGION

A layer in a semiconductor, adjacent to its contact with a metal, in which there is almost complete ionization of atoms in the lattice and few charge carriers, resulting in a space-charge density.

GEAR LOADING

The power transmitted or the contact force per unit length of a gear.

ANGLE BEAM

Ultrasonic waves transmitted for the inspection of a metallic surface at an angle measured from the beam center line to a normal to the test surface.

GEAR DRIVE

Transmission of motion or torque from one shaft to another by means of direct contact between toothed wheels.

SRU

Search and rescue unit composed of trained personnel and provided with suitable equipment.

OSC

On-scene commander: The commander of a rescue unit designated to co-ordinate search and rescue operations within a specified area

OSC

On-scene commander: The commander of a rescue unit designated to co-ordinate search and rescue operations within a specified area

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