single cylinder的用法和樣例：
例句
- The crane boom is hexagonal conformation,single cylinder,sequence and synchronous telescoping.The lifting capacity is very good.
吊臂為四節主臂一節副臂，主臂採用大圓弧六邊形結構，單缸同步伸縮，具有很好的起重作業性能。 - This crane features outstanding characteristics of easy and convenient operation, working stable and reliable.It has one single derrick cylinder, four telescoping booms.
該機起重臂採用單缸變幅，四節臂同步伸縮，中間臂長，起重能力大。
