Downlen.唐尔
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-dip mining俯斜开采
Downslope tillage顺坡耕作
down-link noise下行链路噪声
down-draft kiln倒焰窑
downbeat forecast降低预期目标
down cutting tool立刨刀
down-cut shears下切式剪切机
downhand position平焊位置
down-to-earthadj.实际的;谦逊的
down-hole tools井下工具