多加后会造成氟立昂不在室内机的蒸发器上蒸发，而在回气管道的连接管上蒸发。
After more can cause fluorine leone do not evaporate on the indoor machine of the evaporator, and evaporation on gas pipe connecting pipe back.
如将最终外排气体引回煤气管，回气管内氧含量低，保证安全，并能减少煤气损失。
If the final discharged gas is led to return to a gas pipe, oxygen content inside a gas returning pipe is low, thereby guaranteeing safety and reducing gas loss.
长输油气管道在敷设或大修时常因地质状况或天气情况的影响造成开挖管沟出现回淤、积水、坍塌等现象。
Silting, water accretion and collapse for the excavated ditch of pipeline are serious problems during the pipe laying or renovation of pipeline due to geological situation or weather.
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