http://www.aaaaspecialties.com/all-categories/custom-manufactured-torsion-springs Torsion springs are helical coil springs that exert a torque or rotary force. Torsion springs are wound clockwise or counter clockwise so that the deflection causes the spring to wind up from the free position.
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National Hardware 7685 Plain Steel Garage Door Right Wind Torsion Spring, 0.250 Wire Diameter by 1-3/4-Inch Inside Diameter by 32-Inch Length by National. $37.39. From the Manufacturer Replaces torsion springs with same wire diameter, inside diameter and length.. Save 41%!
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Cherry blossom avenue in Bonn, Germany. For two to three weeks each spring, the magical tunnel created by the trees lining Cherry Blossom Avenue in Bonn, Germany, brings in tourists and photographers alike.