基本解释[经济学]斗式挖沟机词组短语短语bucket t trench digger 斗式挖沟机multi bucket trench digger 多斗挖沟机multi -bucket trench digger 多斗式挖沟机inclined chain -and-bucket trench digger 倾斜式链斗挖沟机专业释义经济学斗式挖沟机