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

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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.


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


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


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.


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.


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


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.


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


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.


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

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