547、Acetone is a heavy-duty degreaser suitable for metal preparation and removing grease from fabric covering prior to doping.

727、Rinse(冲洗) the basin with water. 用水冲洗盆。

726、Remove the sleeve to release the sliding tube 拆卸套管以释放滑动管

725、Remove the sealant with a blunt scraper.

724、Remove the pin before you turn the pulley

723、 Rectify the defect before you stop the pump momentarily. 在暂时停止泵前先纠正缺陷。

722、 Perform preliminary inspection of all articles that are maintained

721、Make sure that you turn the control knob counterclockwise

720、 Make sure that you remove all tools and equipment.

719、Make sure that the indication on the gauge agrees with the quantity that is in the tank.

718、 Make sure that the cabin pressure stays constant.