1. Constant Force Spring 2. Constant Torque Spring 3. Constant Force Spring for Carbon Brush 4. Power Spring and Prestressed Power Spring 5. Variable Force Spring 6. Spring-Strip Tube 7. Assembly and ...
Swatch Group has patented a method for measuring the torque of a balance spring in a timepiece oscillator. The method involves using a main tool with a mock arbor and a holding tool to grip the outer ...
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