SERVO, An automatic control system which checks its 伺服系統，

output against its input so as to achieve a desired   能檢查輸出和輸人數據，以便合適調控的自動控制系

control.                                            統。

SERVO ARMED, Hydraulic pressure for the servo is    伺服預位，

present to allow the servo to internally synchronize to 液壓使伺服系統內部同步至適當的位置，但伺服系統的

the proper position, but the mechanical output of the 機械輸出還沒有接通。

servo is not connected.

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英漢對照民用航空詞典                                  BOEING

SERVO ENGAGED, The mechanical output of the        伺服系統預位，

servo is connected and the servo can move a surface or 伺服系統的機械輸出與伺服系統已接通，伺服系統可移

control                                            動一個平面或操縱。

SET SCREW, A small screw (usually headless) used to 定位螺絲釘，

fasten a pulley, wheel, or knob onto a shaft and prevent 小螺絲釘（一般是沒有釘頭的）用于將滑輪，車輪，或

rotation.                                          旋鈕緊固在軸輪上被免轉動。

SG, SEE - SYMBOL GENERATOR                         符號發生器，

                                                    見Symbol Generator．

SHEAR, The stress exerted on a material or, assembly 剪切力，

which tends to slide the mating surfaces parallel to each 加在材料或組件上的應力。該力往往導致互相平行的成

other.                                             對表面滑動。

SHIMMY, Rapid oscillations (left-right) of the landing 擺振，

gear wheels.                                        起落架輪子的快速的左右擺動。