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balance arm

balance arm

[′bal·əns ‚ärm]
(building construction)
On a projected window, a side supporting arm which is constructed so that the center of gravity of the sash is not changed appreciably when the window is opened.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.

balance arm

On a projected window, a side supporting arm which is constructed so that the center of gravity of the sash is not changed appreciably when opened.
McGraw-Hill Dictionary of Architecture and Construction. Copyright © 2003 by McGraw-Hill Companies, Inc.
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References in periodicals archive
The instruments that are attached to a dental chair are foot switch, imaging system, balance arm, operating light, X-ray viewer, and extended tray.
Two of the three remaining systems are of a very similar type consisting of superior balance arm constructions, each with different but easy to use gripping heads.
The top-loading TGA design is said to mean no more finicky hang-down wires or fragile exposed balance arms. The DMA 242 E Artemis is said to be a powerful tabletop dynamic mechanical analyzer model for fast and easy characterization of viscoelastic behavior and mechanical properties as a function of frequency, temprature and time.
Instead, the mast rolls out on the truck's balance arms, extending the forks into a storage location.
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