m**c
发帖数: 7349 | 1 The rocket climbed in a clear nighttime sky, and a camera fixed to the
vehicle showed the Long March 2F’s four strap-on YF-20B booster engines
dropping away about two-and-a-half minutes into the flight. Moments later,
the core stage jettisoned and the second stage’s main engine and vernier
steering thrusters ignited as planned. | m**c
发帖数: 7349 | 2 A vernier thruster is a rocket engine used on a spacecraft for fine
adjustments to the attitude or velocity of a spacecraft. |
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