液压卸货平台/的臂架是设备运行中的主要受力部件，它的正常伸缩才能使货物或人完成位置件的转换，可见这方面非常重要。到目前来说，液压卸货平台臂架的伸缩方式已经变得更加多样化了，包括了顺序伸缩、同步伸缩、独立伸缩等几种，不同类型的设备中配备的伸缩方式都是有所不同的。
The arm of the hydraulic unloading platform is the main force in the operation of the device, it's normal to make the goods or people to complete the conversion of the position, which is very important in this regard. At present, the expansion of the platform of the hydraulic unloading platform has become more diverse, including the order of the expansion, synchronization, and other types of independent and flexible, different types of equipment in the expansion mode is different.

液压卸货平台/臂架顺序伸缩都是按照一定的先后次序来完成伸缩动作，为的是可以使液压卸货平台各节臂伸出后的起重能力与升降机的起重特性相适应。而液压卸货平台同步伸缩就是设备上的各个节臂以相同的形成比率同时伸缩，并没有谁先谁后。独立伸缩也很容易理解，液压卸货平台的各个节臂的动作之件没有联系，可以独立完成不同的动作。 
In order to complete the expansion of the hydraulic unloading platform, the lifting capacity of the crane can be adapted to the lifting capacity of the crane. While the hydraulic unloading platform is synchronized with the same ratio of the various sections of the device at the same time stretching, and no one who first. Independent expansion is also easy to understand, the hydraulic unloading platform of the various sections of the arm of the action is not linked, can be independent of different action.