Except for the theory research, it also argues the economic rationality of the virtual network operation mode by some quantitative demonstration analysis.
除理论研究外，本文还通过实证定量分析，论证了虚拟电信运营模式在经济上的合理性。
At the end of this thesis, treatise the method to modeling the assemblies, complete the virtual assembly system of horizontal piston pump, give the operation mode about it.
最后，论述了装配体虚拟建模的方法，完成了卧式柱塞泵虚拟装配系统的设计与实现工作。
At the end of this thesis, treatise the method to modeling the assemblies, complete the virtual assembly system of horizontal piston pump, give the operation mode about it.
最后，论述了装配体虚拟建模的方法，完成了卧式柱塞泵虚拟装配系统的设计与实现工作。
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