bèi yòng qì jiàn
- BU(backup unit)
- standby device
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gules,
gulf,
Gulf Coast,
Gulf of Aden,
Gulf of Alaska,
Gulf of Aqaba,
Gulf of Guinea,
Gulf of Mexico,
Gulf States,
Gulf Stream,
相似单词
备用定位,
备用金,
备用零件,
备用轮胎,
备用品,
备用器件,
备用设备,
备用石,
备用现金,
备用信用证,