锅炉

donkey pump

副泵

624 副锅炉 donkey boiler | 626 副泵 donkey pump | 627 门垫 door mat

double cone classifier

双锥选粒机

"double combustion chamber boiler","双燃烧室锅炉" | "double cone classifier","双锥选粒机" | "double contact","双接触,双重接点"

double-claw flexible coupling

双爪式挠性联轴器

double-claw flexible coupler 双爪式挠性联轴节 | double-claw flexible coupling 双爪式挠性联轴器 | double-combustion boiler 双炉镗锅炉

double-helical gearbox

人字齿轮减速器

double-header boiler 双筒式水管锅炉 | double-helical gearbox 人字齿轮减速器 | double-hook oil ring 双刃刮油环

downcast ventilator

下向通风筒

downcast ventilator 吸气通风筒 | downcast ventilator 下向通风筒 | downcast 锅炉)降水管

downcast ventilator

进气通风筒

降水管,降流管 downcast pipe | 进气通风筒 downcast ventilator | 降水管(锅炉) down-comer tube

Downdraft carburetor

上呼式化油器

downdraft boiler 下部排烟锅炉 | downdraft carburetor 上呼式化油器 | downdraft furnace 正威严炉

dowsing rod

探矿杖

dowser 遮光板 | dowsing rod 探矿杖 | dowtherm boiler 热传导锅炉

duc

下拖式潜水工作舱

dubuissonite 红蒙脱土 | DUC 下拖式潜水工作舱 | duck's nest 泥浆备用罐;锅炉炉膛;一种井架平台

duckbill

鸭嘴;鸭嘴装载机

duck'snest 泥浆备用罐;锅炉炉膛;一种井架平台 | duckbill 鸭嘴;鸭嘴装载机 | duckboard 罐顶人行栈桥

photoperiodic response：光周期响应

photoperiodic induction 光周期诱导 | photoperiodic response 光周期响应 | photoperiodism 光期性

Multi-Variate Statistical Analysis：多元统计剖析

311. 多项距阵 Multi-Nominal Matrix | 312. 多元统计剖析 Multi-Variate Statistical Analysis | 313. 发电厂 Power Plant