在圖 3-1中，我們可以看出，調(diào)節(jié)空氣從右組件流向主分配管道，還有調(diào)節(jié)空氣從左組件流向主分配管道和進入駕駛艙。另外，從左混合艙出來的配平空氣管道增加熱空氣給駕駛艙管道。主分配管道通過兩個側(cè)壁豎管供氣給客艙頂部分配系統(tǒng)。

(6) A 3-phase fan draws air from the collector shroud through filters and discharges into the main distribution manifold for redistribution.

一個三相風扇從收集器防護罩穿過過；濾器和排出口進入主分配管道，用以再分配。
LESSON 4 PRESSURIZATION INTRODUCTION增壓系統(tǒng)簡介
一、單詞二、TEXT
組件  Pack 控制  Control  \座艙高度  Cabin altitude
外流閥  Outflow valve 保持  Maintain 盡可能的 …  As as possible
目的地  destination 安全的  Safe 舒適的  Comfortable
曲線  Curve 對時間的  Against time 起飛  Takeoff
巡航  Curise 虛線  Dotted line 實線  Solid line
爬升  Ascend 下降  Descent 近  Near
環(huán)境  ambient 減小  decrease 變化率  rate 

確定、決定  Determine 大氣  Atmosphere 例子  Example
磅/英寸  Psi=pound per square inch 參照 …  By referring 圖表  Chart
描繪  Depict 與 …的關(guān)系曲線  versus 稱之為 …  Is referred to as
制度  Sytstem 水銀  mercury 毫巴  Millibar
相等的  identical 施加  exert 排出  exhaust
向機艙外  outbroud

(1) the air conditioning packs supply conditioned air into pressurization system. the pressurization system controls cabin altitude by regulating air flow from the fuselage, through the outflow valve. The pressurization system maintains cabin altitude as close to sea level as possible or at an altitude equal to the altitude of the flight destination, so the pressurization system provides a safe comfortable cabin altitude for the crew and passenger at all airplane altitude.

空調(diào)組件為增壓系統(tǒng)提供調(diào)節(jié)空氣。增壓系統(tǒng)通過調(diào)節(jié)機身氣流控制客艙高度，通過外流閥，增壓系統(tǒng)保持客艙高度盡可能的接近海平面或等于飛行目的地高度，這樣增壓系統(tǒng)可為機組和旅客在整個飛行過程中提供一個安全舒適的客艙高度。

(2) Figure 4-2 shows a curve of airplane and cabin altitude against time from take off through cruise to landing . airplane altitude is shown in dotted line. Cabin altitude is shown in solid line. The airplane starts its flight at an airport altitude near sea level, ascends, cruises, and descends to a landing airport near sea level.

圖 4-2顯示為飛機和坐艙高度在起飛、巡航及著陸階段的時間曲線。飛機高度顯示為虛線，坐艙高度顯示為實線。飛機以接近海平面的機場高度開始飛行、爬升、巡航、下降和接近海平面的機場著陸。

(3) Cabin altitude starts at the take off altitude. As the airplane climb, the ambient pressure decreases; the higher the altitude, the lower the pressure. The altitude inside the airplane (cabin altitude)also climbs but at a lower

rate than the airplane. The pressurization system provides the pressure differential between the cabin and ambient.