MPACT is a pneumatic system that generates the high-pressure, compressed air required to jettison weapons from various military aircraft.
MPACT是一种气动系统，能产生高压，它能压缩空气，用于从各种军用飞机上投放武器。
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The problem, he explained, was that an acceptable new process has yet to be put in place, and until one is, it would be impractical to jettison the old system.