圆盖,汽包dome
圆顶天窗domeskylight
副锅炉donkeyboiler
副机,辅机donkeyorauxiliaryengine
副泵donkeypump
门垫doormat
门坎doorsill
门口doorway
都卜勒测程仪Dopplerlog
都卜勒声纳Dopplersonar
双动,复动doubleacting
双动引擎doubleactingengine
双动泵doubleactingpump
双角材doubleanglebar
双座艇doublebankedboat
双臂连杆doublebarlink
双座阀,双层阀doublebeatorseatvalve
双层铺doubleberth
双铺房舱doubleberthcabin
双斜槽,K形槽doublebevelgroove
双轮滑车doubleblock
二重底doublebottom
二重底舱doublebottomtank
双断开关double-breakswitch
双层舱壁doublebulkhead
双层床doublebunk
双搭板doublebuttstrap
双向搭板接合doublebuttstrapjoint
复式卡钳doublecalipers
复示功图doublecard
双腔调速管电doublecavityklystron
双曲率doublecurvature
双缸引擎doublecylinderengine
双层甲板doubledeck
