常見例句用作名詞 (n.)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(jī)起重臂採(cǎi)用單缸變幅，四節(jié)臂同步伸縮，中間臂長(zhǎng)，起重能力大。 返回 one-lung