短语词组短语two -bowl scraper 双斗铲运机back bowl scraper 导向头刮管器tandem -bowl scraper 串联斗式铲运机Open bowl scraper 开斗式铲运机scraper bowl 铲运机斗;转式刮土机;铲斗scraper bowl floor 铲运机斗底板scraper bowl area 铲运机斗区位 返回 bowl scraper