SELCAL, SEE - SELECTIVE CALLING                        選擇呼叫，

                                                         見Selective Calling.

SELECTIVE CALLING, A system that automatically         選擇呼叫，

alerts the flight crew to a call from the airline ground 一個能自動將航空公司地面站呼叫報知機組的系統。

station.

SELECTOR VALVE, A valve in the hydraulic system for    選擇活門，

connecting hydraulic supply to one side of the actuator  液壓系統中，用于將液壓源一端連接作動簡，另一端連

and the other side to the return line.                 接回油端的活門。

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英漢對照民用航空詞典                                   BOEING

SELF SEALING COUPLING, A connection between two     自封接頭，

fluid filled hoses for preventing fluid loss when the hoses 用以連接兩個充滿液體的軟管的特制接頭。在兩個管子

are separated.                                      分開時，接頭內的彈簧即使活門堵住通道，自動封閉而不

                                                    讓液體流出。

SEMI-MONOCOQUE, Type of construction in which the   半硬殼式結構，

skin, stringers and frames carry all the loads.       使蒙皮，長桁和隔框共同承受所有載荷的構造形式。

SENSOR, An electrical device for detecting variable 傳感器；

conditions and sending a signal to indicators and lights. 檢測變量狀況并將結果以信號送至指示器和指示燈的

                                                    電氣裝置。

SENSOR ACTUATOR, A device for operating the         傳感器致動器，

sensor.                                               用以操作傳感器的裝置。