耐低温冲击
low-temperature impact resistance
超低浓度瓦斯气
ultra-low concentration air methane
超低膨胀
ultralow-thermal expansion
超低频标准振动台
Ultro low frequency standard vibrator
Ultra-low Frequency Standard Vibrator
超低频大振幅
ultra low frequency and large amplitude
超低频脉冲梯度磁场
ultralow frequency pulsed gradient magnetic field
超低频移相器
ultra-low frequency phase shifter
超低侵害油气层保护剂
Ultra-low permeability reservoir protection agent
超低侵害钻井液
Ultra-low filter loss drilling fluid
超低膨胀率镜望远镜
ultra-low-expansion mirror telescope
超低热值燃料
Ultra-low Heat Value Fuel