Secondly, the constitution of the truck mounted concrete pump and the structural traits and machine characteristics of the boom system were introduced in detail.
然后详细的介绍了泵车的基本组成及臂架系统的结构特点和机构特性。
As the main stress component, box truck crane telescopic boom usually accounts for the weight machine for 13 ~ 20%, while the percentage of large cranes is greater.
箱形伸缩臂作为汽车起重机的主要受力构件，其重量一般占整机的13 ~ 20%，而大型起重机占的比例则更大。
The boom assembly also includes an actuator connected between the frame of the work machine and the boom by a third frame pivot connection and a third boom pivot connection.
悬臂组件还包括一致动器，该致动器由一第三构架枢 轴连接件和一第三悬臂枢轴连接件连接在工作机械的构架和悬臂之间。
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