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Unique Balance, the original inventor of the spiral balance system in 1932, produces a product line including Block and Tackle, Constant Force, Pivot Shoes, ...
Lite Lift  Pivot Bar  Screen Corners  Tilt for Jamb 
www.unique-balance.com - 2009-02-12
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extension springs
computer
software
tools
radius3
hand tools
laptop
block and tackle
power tools
computer repair
coil spring
application
glass
notebook
extension spring
door
garage
compression spring
doors
thin-client
block & tackle
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