... critical fusion frequency 临界停闪频率 critical gas velocity 临界气速 critical gradient 临界梯度，击穿梯度，临界坡度 ...
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valve hole critical gas-velocity 临界阀孔气速
When gas flow velocity in a wellbore is less than a critical gas flow velocity maintaining continuous flowing back in a gas well, a liquid carrying phenomenon occurs in the gas well.
当井筒内气流速度低于维持气井连续排液的临界气流速度时，气井出现携液现象。
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