液化气罐区排污沟在什么情况下可以不要? 如果原文是这样： for storage vessels in dedicated lpg service always having an adiabatic flash fraction larger than 0.1 (the fraction on a mole base going to vapour when flashed from process conditions to 1 bar (abs) ) together with a resulting adiabatic flash temperature 20 0c or more below the lowest ambient temperature, the concrete paving together with the perimeter drain channels can be omitted. 那么就需要把always having ... ambient temperature这一长串都作为dedicated lpg service的定语看待，而(the fraction on a mole base going to vapour when flashed from process conditions to 1 bar (abs) )是作为对adiabatic flash fraction的一个注释，这样的话译文如下： 对于（存放）绝热闪蒸率始终大于0.1（从工艺条件闪蒸到1bar（绝压）时进入气相的摩尔比率）且最终绝热闪蒸温度比最低环境温度低20度或20度以上的lpg专用储罐，可以不需要混凝土护面和围护（排水）沟。 这样理解和断句似乎更加合理一些。 [ ]查看更多
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