短语词组短语wheel trencher 轮式挖沟机ditchdigger trencher 挖沟者trencher cap 学士帽hydraulic trencher 液压挖沟机trencher plough 挖沟犁tile trencher 瓦t trencher 链斗式挖沟机bucket trencher 斗式挖沟机;多斗式挖沟机rotary trencher 旋转式挖沟机;旋转开沟机 返回 trencher