disconnector 切斷器
disinfectant tank 消毒箱
dispatch floor 調度樓層
dispatch interval time 調度間隔時間
dispatch panel 調度盤
dispatch signal 調度信號
dispatcher board 調度程式指示板；綜合指示箱
dispersant 化油劑
displacement switch 位移開關
displacement type governor 位移式調速器
disposable cylinder 只用一次的石油氣瓶
disposable liquefied petroleum gas cartridge 只用一次的卡式石油氣瓶
distinctive smell 特有氣味
distortion 失真
distribution board 配電箱
distribution of electricity 分配電力；配電
distribution panel 配電盤；配電板；配電屏
distribution substation 配電分站
distribution system 配電系統
distributor 分火器；分配器；分銷商
district cooling scheme 區域性冷卻系統
diurnal variation 日際變化
diversion kerb 導流壆
diversion sheave 折向輪
diversity 參差額
diverter 分流器
diverting pulley 折向滑輪
domestic gas appliance 住宅式氣體用具
domestic instantaneous gas water heater 住宅式即熱氣體熱水爐
door cam 門鎖
door catch 門扣
door close button 關門按鈕
door closing weight 自動關門錘砣
door contact 門觸點
door control 門控制
door gasket 櫃門封邊膠條
door gib 門導塊
door header cover 門頭罩
door hinge 門鉸；門鉸鏈
door interlock 門聯鎖
door interlock switch 門聯鎖開關
door limit switch 門限位開關
door lock 門鎖
door lock cover 門鎖罩
door locking device 鎖門裝置
door open button 開門按鈕
door open limit 開門限位
door operating gear 門啟動裝置
door operating guide 門啟動導向件
door operation 門操作
door sill 門坎；門坎
door track 門軌
dose 劑量
dose rate 劑量率
dosimetry 劑量學；劑量測量法
double burner 雙頭爐
double case construction [fuel tank] 雙層包箱〔油箱〕
double riveting 雙排鉚接
double wrap 雙繞；復繞
double-capped fluorescent lamp 雙頭螢光燈
double-insulated equipment 雙重絕緣器具
double-insulated isolating transformer 雙重絕緣隔離變壓器
double-pole switch 雙極開關掣
double-wound 雙線繞組的
double-wound transformer 雙繞組變壓器
down arrow 下行箭頭
down direction valve 下行控制閥
down final limit and terminal stopping switch 最低限位及最低樓層停機掣
down rod 懸桿
down-draught diverter 倒風折流器；拔風罩
downstream 下游
drain 放水；排水
drain cock 排水鏇塞；“清缸掣”
drain valve 排水閥
drawbar 牽引桿
drawn-in tape 拉線帶
draw-off connection 卸載接頭
draw-off rate 出汽率
drill 電鑽
drilling machine 鑽
drip pan 接滴盤
drive 驅動；驅動裝置
drive axle 驅動輪軸
drive chain 驅動鏈
drive control 驅動控制
drive hub 驅動輪轂
drive motor 驅動馬達
drive system 驅動系統
drive unit 驅動器；驅動單元
driving belt 驅動皮帶
driving gear 驅動齒輪
driving gear assembly 驅動齒輪組件
driving gearbox 驅動齒輪箱
driving machine 驅動機
driving machine brake 驅動機制動器
driving motor 驅動馬達
driving pinion 驅動齒輪
driving sheave 驅動輪
drop test 下墜測試
drum drive 滾筒驅動裝置
dry cooking appliance 乾式煮食器具
dry powder type fire extinguisher 乾粉滅火器
drying machine 乾衣機
dry-sealed gasholder 乾封式貯氣鼓
duct 管道
duct air treatment system 管道空氣處理系統
ducter 微阻計
ductility 延展性；延伸度
ducting 管道；管通
ductwork 管道系統
dumb waiter 小型送貨升降機；送菜升降機
duplex control 兩部相聯控制
duplicate conductor 二重導體
duplicate insulator 二重絕緣體
duplicate permit 複本許可證；許可證複本
duplicate protective conductor 雙重保護導體
dust seal 防塵封
duty technician 值勤技術員