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With the method of geometrical figuration,calculates the mathematical module of coil box gap . And base on it,affords the mathematical modules of the top rollers rising speed in the winding period of coil box .

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But the steel box girder is typical space thin-walled bars, because of bending-torsion coupling and steel curved box bridge distribution of stress is relatively more complicated even under dead load, so it is necessary to distribute emulation analysis to the real stress of curved box bridge.

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A sealed dust collection system consists of drum controller,far,dust-collecting box filter,pipeline and drum cavity.

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