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无线闭塞中心
采用无线通信方式实现列车间隔控制的地面设备。系统接收所辖区段所有列车的位置信息,向所有列车发出行车许可并提供列车间隔控制功能。
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surface of constant phase
surface of constant width
surface of contact
surface of degeneration of type
surface of degree p
surface of discontinuity
surface of equal distances
surface of finite type
surface of general type
surface of genus g
surface of genus zero
surface of intersection
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surface of materials
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surface of order n
Surface of phase change heat transfer
surface of positive curvature
surface of r contours
surface of revolution
surface-of-revolution parallel
surface of rotation
surface of screw motion
surface of second order
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