The development method of the process flow diagram (PFD) is based on a new design method of process flow diagram, adopted in the international companies in recent years.
工艺流程图(PFD)的扩展方法，是国际工程公司近年采用的一种新的工艺流程设计方法。
The development method of the process flow diagram (PFD) is based on a new design method of process flow diagram, adopted in the international companies in recent years.
工艺流程图(PFD)的扩展方法，是国际工程公司近年采用的一种新的工艺流程设计方法。
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