常見例句雙語例句The series of electric control devices developed in 70s for overhead travelling and gantry cranes has several shortcomings.70年代我國(guó)統(tǒng)一設(shè)計(jì)的橋式、門式起重機(jī)系列電控設(shè)備存在不少缺點(diǎn)。 返回 travelling gantry