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。
该机器采用国产机械盘刀进行分切原料，采用的切割方式上刀片对应底刀套剪切。
Home-made mechanical slitting device using "upper blade to bottom blade slot" slitting method is equipped with this machine.
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.
系列盘式削片机由机座、刀盘、进料口、罩壳、电控系统等部分组成。
The series of disc chippers is made up of seat, cutter disc, feed inlet port, shell, electric control system, etc.
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