本书是吴景超的代表性著作。该书对于中国的经济社会问题提出了一种总体上的分析框架。作者以人口密度和职业分派为标准，将世界上的各个国家分为四种类型。
密封舱压力的设置和控制直接关系到开挖地层的稳定、刀盘刀具的磨损和盾构掘进效率。
The pressure balance control between the chamber and the ground at the excavation face is the key for tunneling safely and efficiently.
根据全断面岩石掘进机盘形滚刀工作时的受力，建立了刀盘受力均匀且横向载荷为零的盘刀布置规律。
According to forces applying on the disk-shaped cutters of whole-section tunneler, cutter arrangement rules are established with even loading on the disk and null traverse load.
设计了盾构刀盘变转速液压驱动系统。
A hydraulic variable speed drive system of shield disk cutter has been designed.
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