料塔中用清水吸收混合气中NH3,当水泵发生故障上水量减少时,气相总传质单元数NOG__。
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吸收的目的和基本依据是什么? 吸收的主要操作费用花费在哪?
As Maggie is our new trainee she always takes the________(minute) at the meetings and knows that the first thing she must write is the agenda.
We cannot ________(emphasis) enough how important it is to implement the new safety rules as soon as possible.participants.