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Physical knowledge, the higher the pressure, the higher the elasticity, so high that the handle is numb. The maximum elastic force erupts a little before the bottom. Now the north intersection position just fits.Physical knowledge, the higher the pressure, the higher the elasticity, so high that the handle is numb. The maximum elastic force erupts a little before the bottom. Now the north intersection position just fits.Feilong seeks the way: when the index is suppressed by the limit, the hydraulic resistance of the spring is the strongest.