289、当通风空气温度升至 30℃时,排气阀打开。
答案解析
解析：
相关题目
1034、Center-of-gravity is the point at/which an airplane would balance if suspended .Its distance from the reference datum is found by dividing the total moment by the total weight of the airplane
1033、语音记录器组件的外壳具有以下特性:防水、耐冲击和耐热。
1032、The aircraft and engine manufacturers recommend that you do not weld engine components when the engine is installed on the airfare.
1031、For the Calibration step , the coupler asks the transceiver for another brief bust of tune power.
1030、临时用一些辅助螺丝来组装这个部件
1029、Put clamps on ethe cable to hold it in position.
1028、Warnings and cautions shall precede the text to which each applies, but notes may precede or follow applicable text depending on the material to be highlighted.
1027、If you install the upper drag strut incorrectly,it will hit the lower drag strut during retraction.
1026、拆下两个螺栓中的一个。
1025、The information to be included on the cover will be left to the manufacturer＇s discretion.
