We have played the spring We also know that injecting energy into it will shrink the absorption of energy

In the metallurgical technology is not developed more than two hundred years ago in ancient Europe, because the conditions of the master used to make the clockwork or simple ordinary steel winding. This spring is rolled with steel after quenching, because the surface in order to rust, so do the roast blue rust treatment, so… Continue reading “We have played the spring We also know that injecting energy into it will shrink the absorption of energy”