downedadj.击落的;击倒的动词down的过去式和过去分词.
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
down line transmission下行线路传输
Downrange Support Ship下靶区支援船只
down filling materials羽绒填充料
down-hole flow field井底流场
downwhole electrodrill孔底电钻
downhole control valve井下控制阀
down-train direction下行方向
down-draft sintering吸风烧结
down-flow evaporator降膜蒸发器
downhole gas separator井下气体分离器