滴滴滴
dichlorodiphenyldichloroethane
DDD
本振源
local oscillator source
the source of local oscillator
local oscillator
反共振振动机
anti-resonance vibrating machine
反共振振动筛
antiresonant vibrating griddle
共振源
digital adjustable source
介质谐振振荡器
drill templatedielectric resonator oscillator
dielectric resonator osci-llator
可控震源振动噪声
vibration noise of vibroseis
扭振振幅
torsional vibration amplitude