民主德国新造八轮凹底平车(图1),其凹底架的每一端通过一个载重滚子支承在四轴的走行架上。 为使凹底架稳定在垂直位置,载重滚子的两侧安装了支撑滚子。载重滚子和支撑滚子传递由货物和凹底架产生的所有垂直力。 两走行架可使凹底架相对中间位置向两 Democratic Germany new eight-flat concave car (Figure 1), each end of its concave chassis by a load-bearing roller bearing on the four-axis rack. In order to stabilize the concave chassis in a vertical position, the support rollers are mounted on both sides of the load roller. The load roller and the support roller transmit all the vertical forces generated by the cargo and the undercarriage. Two walking rack can make concave chassis relative to the middle position to two