(condenser).

DIFFERENTIAL PRESSURE, Pressure relative to              压差，

another pressure in the same system, measured in            相对于同一系统内另一个压力的压力，以每平方英寸

pounds per square inch differential (psid).              多少磅压差计算 （psid）。

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

compressor and combustion chamber for reducing the          发动机内压气机和燃烧室间的一个部件，用来降低空

airflow speed and increasing the air pressure.           气流速并增高空气压力。

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

remains constant for a finite period of time. Digital       指一种信号。该信号在一定的时间内，振幅保持不变。

signals are commonly represented as a series of high     通常由一系列的高低脉冲表示。

and low pulses.

DIGITAL-TO-ANALOG, The process of converting a           数一模转换，

digital signal (binary) to a continuously variable (analog) 将数字信号 （二进制）转换成与原信号相似的连续可

signal that is a close approximation of the original     变（模拟）信号的处理过程。

signal.

DIHEDRAL, The angle between the wing reference           上反角，

plane and water line.                                       机翼基准面与水线之间的夹角。

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英汉对照民用航空词典                                       BOEING

DILUTER DEMAND REGULATOR, A component in the            稀释氧调节器，

crew oxygen system which mixes air and oxygen and         驾驶舱氧气系统中的一个部件，它将空气和氧气混合，

supplies constant oxygen pressure even if there are     即使驾驶舱环境压力改变，它也能提供恒定的氧气压力。

changes in ambient cockpit pressure.

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

is the opposite of bright.                                一个形容光线亮度的词。对于灯光控制装置，暗的反