港口门座起重机是港口装卸作业的主要起重设备。
The portal crane is the main hoisting equipment for loading and unloading in the port.
港口门座起重机是港口生产作业的主要装卸设备，其运行技术状态的好坏直接影响着港口的生产效率和经济效益。
Portal Cranes are the main handling facilities of the port production and the technological state of their performance affect the production efficiency and economic benefits of the port directly.
随着变频器的日益普及，其在港口设备上得到了广泛的应用，门座式起重机也普遍采用了变频控制技术。
Along with popularizing of inverter increasingly, inverter is widely used in many harbour facilities such as portal crane.
最后作为复杂机械产品的应用实例，建立了港口门座式起重机的CAD系统模型。
As an example, we build the model of the portal crane CAD system to verify the above techniques and criterions.
最后作为复杂机械产品的应用实例，建立了港口门座式起重机的CAD系统模型。
As an example, we build the model of the portal crane CAD system to verify the above techniques and criterions.
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