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单词
payload assist module
释义
WordReference Random House Unabridged Dictionary of American English © 2024
pay
′
load assist
′
mod′ule,
Rocketry, Aerospace
a U.S. solid-propellant rocket used to boost a medium-weight spacecraft from a circular low-earth orbit to an elliptical transfer orbit for later insertion into a geosynchronous orbit.
Abbr.:
PAM Cf.
inertial upper stage.
1980–85
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更新时间:2026/4/25 6:14:02