环境设备描述陈述
environment description on statement
长期保持低调
has long maintained a low profile
低低跟踪模式
Low-low satellite to satellite tracking mode
低低水位
LLWL (low-low water level
低-低水位开关
low-low water level switch
低低卫卫跟踪
Low-Low Satellite-to-Satellite Tracking
低低卫－卫跟踪
satellite-to-satellite tracking in low-low SST-ll
低低温烟气处理系统
Mitsubishi recirculated nonleak type gas-gas heater
低调频率匹配滤波
low chirp rate matched filtering