single cylinder的用法和样例：
例句
- The crane boom is hexagonal conformation,single cylinder,sequence and synchronous telescoping.The lifting capacity is very good.
吊臂为四节主臂一节副臂，主臂采用大圆弧六边形结构，单缸同步伸缩，具有很好的起重作业性能。 - This crane features outstanding characteristics of easy and convenient operation, working stable and reliable.It has one single derrick cylinder, four telescoping booms.
该机起重臂采用单缸变幅，四节臂同步伸缩，中间臂长，起重能力大。
