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satellite ephemeris
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satellite ephemeris
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satellite ephemeris
卫星星历
以开普勒定律的6个轨道参数来确定卫星的位置、速度等各项参数的数据系统,主要用于对人造地球卫星运动预测、跟踪、定位等。又称两行轨道数据。
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lock in amplifier
lock-in amplifier
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locking and separating device of Satellite rocket
locking assemblies
locking flange
locking scheduler
lock-in infrared thermal imaging system
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lockout impulse
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lock-servo system
locksets
LOCKSS数字资源长期保存服务网络
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Lock, Stock and Two Smoking Barrels
lock synchronization
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locoism
locomotive
locomotive auxiliary system
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