505.The oil is dangerous if you let it be absorbed through your skin and into your body ( )

432.Illustrations should be used whenever they will simplify, shorten, or make the text easier to understand ( )

431.Do these two steps simultaneously( )

430.在测试过程中,确保滑油液面在观察窗中可见( )

429.用标签识别被分解的部件 ( )

428.You can only do this procedure on the ground( )

427.堵盖的拆卸是必要的 ( )

426.Procedures for handling malfunctions or other abnormalities that are not of emergency nature , or involve a potential emergency that may be deferred may be included in this section ( )

425.If a supply shutoff valve was closed for less than five minutes ho maintenance is required and shutoff periods are not accumulative ( )

424.The trailing edge flaps up limit switch sends flap position data to SMYD 1 The SMYD 1 uses this during yaw damping to limit rudder movement when flaps are up( )

423.Rectify the defect before you stop the pump momentarily ( )