腐蚀会降低材料的疲劳寿命而超载则对疲劳寿命有增益作用。
Corrosion results in decrease of metal fatigue life and overload can result in prolonging of fatigue life.
当直接由固定贮仓装料的螺旋输送机，而又没用流量调节装置，则大大地增加了超载的危险。
When directly by screw conveyor fixed storage charge, and no flow control device, it has greatly increased the risk of overload.
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