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ID：9436-7494
（翻译）Lathes are machine tools designed primarily to do turning, facing, and boring. Very little turning is done on other types of machine tools, and none can do it with equal facility. Because lathes also can do drilling and reaming, their versatility permits several operations to be done with a single setup of the workpiece. Consequently, more lathes of various types are used in manufacturing than any other machine tool.
ID：9436-7509
（翻译）It is seldom that a design problem has only one right answer, a situation that is often annoying to the beginner in machine design。查看解析
ID：9436-7511
（翻译）The idea that engineers need to create a new design to solve every problem is quickly becoming obsolete(过时的)。查看解析
ID：9436-7505
（翻译）Force F is a vector. The characteristics of a force are its magnitude, its direction, and its point of application 。查看解析
ID：9436-7503
（翻译）The branch of scientific analysis which deals with motions, time, and forces is called mechanics and is made of two parts , static and dynamics。查看解析
ID：9436-7513
（翻译）力通过配合表面传到机器中的各构件上。查看解析
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