diaphragm control valve 膜片控制阀 diaphragm cut-off valve 膜板截断阀 differential valve 差动阀 differential pressure fuel valve 压差油阀 differential pressure regulating valve 差压调节阀 differential relay valve 差动中继阀 differential sliding valve 差动滑阀 diffuser valve 扩散阀 diffusing type steam valve 扩压式汽阀 direct admission valve 直接进风阀 direct pressure control valve 直动式压力控制阀 direct-acting valve 直动阀 direct-acting control valve 直接作用控制阀 direct-acting solenoid valve 直接动作螺管阀 direct-mounted valve 管式连接阀 direction(al) control valve 方向控制阀 director valve 主导活门 disc valve 片状阀 discharge valve 排出阀;卸料阀 disconnecting valve 断流阀, 断开阀, 截止阀 disc-type reducing valve盘式减压阀 diskvalve 盘形阀 distributing valve 分配阀 distributing slide valve 分配滑阀 distribution valve 分配阀 diverter valve 偏向型元件 分流阀 dividing valve 分流阀 dividing control valve 分配控制阀 dorsal valve 【解】背瓣 double valves 双阀 double branch stop valve 双向止流阀 double check valve 双止回阀, 双单向阀 double damper valve 双调节阀, 双减振阀 double gate valve 双闸阀 double ported valve 双口阀 double pressure feed valve 双压进给阀 double return valve 双止回阀, 双回流阀 double safety valve 双安全阀 double seat balanced valve 双座平衡阀 double seated main stop valve 双座式主汽门 double sleeve valve 双套阀 double slide valve 双动滑阀 double-anode valve 双屏极电子管 double-beat (drop) valve 双座阀, 双支承提升阀, 平衡阀 double-beat poppet valve 双层提升阀 double-face valve 双面阀 double-faced slide gate valve 两面滑门阀 double-grid valve 双栅管 double-heading valve 重联阀 double-piston valve 双活塞阀 double-ported slide valve 双动滑阀 double-purpose valve 【电子】双作用管 double-ring valve 双环阀 double-triode valve 双三极管 drain valve 排水阀;泄水阀 draw-off valve 排水阀;泄水阀 drip valve 排水阀;泄水阀 driver's automatic brake valve 司机自动制动阀 driver's vacuum brake valve 司机真空制动阀 drop valve 落阀 dropping valve 降压阀, 减压阀 drum valve 鼓形阀 dual ball check valve 双球止逆阀 dual-gravity valve 【化工】双比重阀 dump valve 倾泄阀(安全阀) Duner flush valve 达式水阀 duplex check valve 双止回阀 duplex release valve 复式缓解阀 dynamic valve 动力阀 dynamic brake blending valve 动力制动混合阀 eccentric valve 偏心阀 effluent sample valve 试样流出阀 Eidophor light valve 艾多福光阀(电视投影机) electric valve 整流管[收起]