A你只能基于依据完成程序；
B你只能在降落后做这件事；
C你只能在地面上执行此程序；
You can only do this procedure on the ground.
We recommended that you do not do this procedure in the hangar.
Before you do this procedure, engage the ramp service door safety connector pin.
Do not do this procedure in the hangar.
BEFORE YOU ( )THE UNIT, DO THE SPECIFIED TEST PROCEDURE.
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