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英汉对照民用航空词典                                      BOEING

PRECISION APPROACH PROCEDURE, A standard               精密进近程序，

instrument approach procedure in which an electronic     己提供有电子下滑道／下滑航径的标准仪表进近程序。

glide slope/glide path is provided; e.g., ILS/MLS and  如：仪表着陆系统／微波着陆系统，以及精密进近雷达。

PAR.

PRESSURE, Force per unit area usually measured in      压力，

pounds per square inch (psi).                            单位面积上的力。通常用磅／平方英寸（psi）来度量。

PRESSURE ALTITUDE, The altitude displayed when         压力高度，

the barometric pressure on the altimeter is set to 29.92 当高度表上的气压调至29．92英寸汞柱时显示的高度。

inches of mercury.

PRESSURE REGULATING AND SHUTOFF VALVE, A               压力调节和关断活门，

valve in the pneumatic system for regulating bleed air   气源系统中用以调节从发动机到气源总管的引气压力

pressure from the engine to the pneumatic manifold.    的活门。

PRINTED CIRCUIT CARD, A plastic or fiberglass card     印刷电路板，

with electronic components and copper strips forming a     由电子部件和铜丝所组成电路的塑胶或纤维玻璃制

circuit.                                               薄板。

PRIORITY VALVE, A valve in the hydraulic system for    优先活门，

operation of components in proper sequence.              液压系统中，用来使各部件照合适顺序操作的活门。

PROCEDURE TURN, A maneuver where it is                 程序转弯，

necessary to reverse direction to establish the airplane 在飞机必须反向建立最后进近航道时所做的机动动作。

on the final approach course.

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英汉对照民用航空词典                                       BOEING

PROXIMITY SENSOR, An electromagnetic device that        邻近传感器，

senses the position of a moving actuator. The sensor      能够感知运动中的作动筒位置的电磁装置。该传感器