Based on the analysis of the stress of movable blocks and the three patterns of block motion, a net sliding force is deduced as the theoretical basis for the identification of key blocks.
在分析了可动块体的受力情况和块体运动的3种模式的基础上,推导出了在3种运动模式下块体的净滑动力,从而为辨识关键块体提供了理论依据。
On the analysis of the techniques of processing pneumatic screw driver transmitting movable block and processing techniques
气动螺丝刀传动活块加工工艺分析与加工工艺
So that was the reason why there were some books printed using movable type, but it never really replaced wood-block printing in the way it did in the West.
这就是为什么即使有些书是采用活版印刷,但是,活字印刷术从来没有象在欧洲一样代替木刻印刷术。
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