Downtonn.唐顿
downadv.向下prep.沿着 ... 而下adj.向下的;消沉的;无礼的n.绒毛;汗毛v.击倒;打败;吞下;被抑制
Downhole pressure measurement油井测压
Down--hole bench Blasting深孔台阶爆破
down cotton harvesting machine落棉捡拾机
Downsphaera pentagonalpororatan.五角星孔绒球藻
downrange of groundwater depth地下水位降幅
downgrade diplomatic relations外交关系降格
downside- entrainment burner普通进风方式燃烧器
down-draft sintering machine吸风烧结机,下流式烧结机
down-flow fluidcatalyst unit下流式催化装置