?降落轨道切入
... descent lane 下降航道 descent orbit insertion 降落轨道切入 descent performance 下降性能 ...
The watch was used to time the duration of the Descent Orbit Insertion maneuver and to time the rendezvous maneuvers after launch from the lunar surface.
FORBES: Apollo 15 Bulova Moon Watch Up for Auction at Bonhams
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