When the material is strong, which is lower than the maximum strength (Ultimate Strength) do go back.Come back repeatedly, it may be due to broken up because of fatigue or induced Fatigue fatigue occurs.In this material is a big cause of the corruption of various machinery parts because of active life.Machines, such as the engine, switch, relays, etc., will need a throttle switch to switch a, which may be up to.Millions of times, causing the fatigue incurred in various parts.
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