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Machine is an artificial combination of physical components. Between the various parts of machinery to determine the relative motion. The machine has the characteristics of institutions, but also must have the third characteristic that is able to replace human labor in order to complete a useful mechanical work or conversion of mechanical energy, so the machine can be useful to convert mechanical energy or completed on behalf of the mechanical principle of the basic concepts, the Chinese Mechanical The modern concept of the multi-Japanese from the "mechanical" in Japan's mechanical engineering of the machine to make the following definition of the concept ofMachinery is a combination of objects, assuming that power added to the deformation of its parts is difficult.These objects have to each other, and a single to put the energy into the most useful form, or converted into an effective mechanical
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急需报价 － 管道系统（按定单制造）非金属管道系统 (硬质聚氯乙烯和高密度聚乙烯)— 散装货以及阀门(LOT－1)- 400 MW CCPP－II 扩建工程 那些字母可能是型号吧。
