农机与农艺
agricultural machinery and art
agricultural machinery and agronomy technology
agricultural machinery and agronomic
农机与农艺配套
agricultural machinery and agronomic support
滨州市农机化发展探究
Agricultural mechanization development in Binzhou
当代农机
contempoary farm machinery
废旧农机回收
discarded agricultural machine recycling
福建农机
fujian agricultural machinery
甘肃省农机化影响因素
influencing factors of Gansu agricultural mechanization
国有农机企业负责人
principals of the state-owned agricultural machinery enterprises
合成有机农药
synthetic organic pesticide
湖南农机
hunan agricultural machinery
基层农机工作
grass-roots agricultural machinery work