hair spring

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Definition of hair spring in English English dictionary

hairspring
The slender recoil spring which regulates the motion of the balance in a timepiece
hairspring
A spring, made of a coil of fine wire, that is used to regulate the movement of a balance wheel in a watch
hairspring
{i} delicate spring in a clock
hairspring
a fine spiral spring that regulates the movement of the balance wheel in a timepiece
hair spring
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