分布式自动化系统    decentralized automation

深水区    deep?

变形范围    deformation band?

形变    deformation?

吐出阀限位器    delivery valve guard

额定排量系数    Derated coefficient of discharge

隔膜式控制阀    diaphragm operated comtrol valve

薄膜式减压阀    Diaphragm reducing valve

介电原片    dielectric sheets

微分对    differential pair

压差    differential pressure?

漫散双层    diffuse double layer?

连接槽尺寸    Dimension of connecting channel

阀杆头部尺寸    Dimension of valve stem head

阀杆端部尺寸    Dimmension of valve stem end

正向作用式减压阀    Direct acting reducing valve

直接载荷式安全阀    Direct loaded safety valve

直接作用式减压阀    Direct-acting reducing valve

反冲盘    Disc holder

排放压力    discharge pressure?

弥散力    dispersion force?

有阀翼板    double acting wing

旋启双瓣式底阀    Double disc swing foot valve

双联弹簧式安全阀    Duplex safety valve

动力稳定度    dynamic stability?

D-scope; D-scan    D型显示

ID coil I    D线圈