立柱采用双伸缩作用液压缸，以增加工作行程来满足支架调高范围的需要。
The column USES the double expansion and contraction function hydraulic cylinder, increases the power stroke to satisfy the support to adjust the high scope the need.
立柱采用双伸缩作用液压缸，以增加工作行程来满足支架调高范围的需要。
The column USES the double expansion and contraction function hydraulic cylinder, increases the power stroke to satisfy the support to adjust the high scope the need.
应用推荐