83、Make ＇sure that there is tension in the lockwire.

1397、It is necessary to clean the filter periodically.

1396、This part provides for a uniform method of arranging and identifying specific subject material.

1395、During the approach to the runway deviation pointers in the course indicators show the pilot in which direction theaircraft must go.

1394、Make sure that the fuel load is equal on each side of the aircraft centerline;

1393、Repeat application of clean solvent as necessary to remove oils.

1392、Outlets along the side walls and the center of the ceiling divide the air for symmetrical supply.

1391、Equivalent substitutes can be used.

1390、Cure the sealant at a constants temperature.

1389、把插头插到插座上。

1388、在管子的连接处缠两层胶带。