(condenser).

DIFFERENTIAL PRESSURE, Pressure relative to              壓差，

another pressure in the same system, measured in            相對于同一系統內另一個壓力的壓力，以每平方英寸

pounds per square inch differential (psid).              多少磅壓差計算 （psid）。

DIFFUSER, A part of an engine between the                擴散器，

compressor and combustion chamber for reducing the          發動機內壓氣機和燃燒室間的一個部件，用來降低空

airflow speed and increasing the air pressure.           氣流速并增高空氣壓力。

DIGITAL, Digital refers to a signal whose amplitude      數字式，

remains constant for a finite period of time. Digital       指一種信號。該信號在一定的時間內，振幅保持不變。

signals are commonly represented as a series of high     通常由一系列的高低脈沖表示。

and low pulses.

DIGITAL-TO-ANALOG, The process of converting a           數一模轉換，

digital signal (binary) to a continuously variable (analog) 將數字信號 （二進制）轉換成與原信號相似的連續可

signal that is a close approximation of the original     變（模擬）信號的處理過程。

signal.

DIHEDRAL, The angle between the wing reference           上反角，

plane and water line.                                       機翼基準面與水線之間的夾角。

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英漢對照民用航空詞典                                       BOEING

DILUTER DEMAND REGULATOR, A component in the            稀釋氧調節器，

crew oxygen system which mixes air and oxygen and         駕駛艙氧氣系統中的一個部件，它將空氣和氧氣混合，

supplies constant oxygen pressure even if there are     即使駕駛艙環境壓力改變，它也能提供恒定的氧氣壓力。

changes in ambient cockpit pressure.

DIM, A word value of light. For light control devices - dim 暗，

is the opposite of bright.                                一個形容光線亮度的詞。對于燈光控制裝置，暗的反