Forming straight, parallel, alternate ridges and grooves in sheet metal, cardboard, or other material.

Related Terms

PARTITION

1. An interior wall having a height of one story or less, which divides a structure into sections. 2. A slotted sheet of paperboard that can be assembled with similar sheets to form cells for holding goods during shipment.

PAPERMACHINE

[MECHENG] A synchronized series of mechanical devices for transforming a dilute suspension of cellulose fibers into a dry sheet of paper.

PACHYMETER

An instrument used to measure the thickness of a material, for example, a sheet of paper.

NONPOINT SOURCE

A dispersed source of stormwater runoff; the water comes from land dedicated to uses such as agriculture, development, forest, and land fills and enters the surface water system as sheet flow at irregular rates.

MASK

1. A frame used in front of a television picture tube to conceal the rounded edges of the screen. 2. A thin sheet of metal or other material containing an open pattern, used to shield selected portions of a semiconductor or other surface during a deposition process. 3. A protective covering for the face or head in the form of a wire screen, a metal shield, or a respirator.

LIGAMENT

The section of solid material in a tube sheet or shell between adjacent holes.

LATH

1. A narrow strip of wood used in making a level base, as for plaster or tiles, or in constructing a light framework, as a trellis. 2. A sheet of material used as a base for plaster.

INTERNAL FLOATING-HEAD EXCHANGER

Tube-and-shell heat exchanger in which the tube sheet (support for tubes) at one end of the tube bundle is free to move.

IC SEE INTEGRATED CIRCUIT.ICE-ACCRETION INDICATOR

An instrument used to detect the occurrence of freezing precipitation, usually consisting of a strip of sheet aluminum about 11/2 inches (4 centimeters) wide, and is exposed horizontally, face up, in the free air a few meters above the ground.

ANTI-FOULING

Paint coating on the bottom of a boat to prevent marine fouling. Traditionally copper sheet was used.

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