721.BE CAREFUL WHEN YOU ( ) PRINTED CIRCUIT BOARDS.

54.WHEN YOU INSTALL THE ANTENNA, THE ALIGNMENT ARROW MUST POINT FORWARD.

53.测量硅胶吸收水分所需的时间。

52.The schematic diagram should tend to deal with an overall system rather
than with subsystems, e.g., the air conditioning system rather than a
compressor or blower within the air conditioning system.

51.IF YOU ( )HYDRAULIC FLUID, GET MEDICAL AID IMMEDIATELY.

50.In the event a page must be added subsequent to the initial printing,
the page shall carry the number of the preceding page with a letter suffix
added.

49.It is( )install more than two washers for each bolt.

48.在重着陆过程中,发动机可能发生冲击载荷。

47.If the shear pin breaks, do an inspection of the towbar.

46.The torsion link assembly can transmit torsional loads from the axle
to the shock strut.

45.A revision means a modification of information in an existing manual.