圆形的砖混地基底座是固定的上面安装了钢轨而房体就由一台小型电动马达驱动在钢轨上转动。
Its circular brick-and-cement foundation is stationary, supporting a steel track on which the house revolves, moved by a small electric motor.
铁路固定设备。长期用铁路工具。钢轨钳。
分析了两种PD3钢轨钢在固定荷载循环条件下不同寿命阶段试样理论应力最大处的维氏硬度的演化。
The rigidity's evolvement of the two kinds of PD3 rail steel at different stage of life is analyzed.
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