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Most air conditioning units have （） for adjusting the ratio of recirculated fresh airCare must be taken not to reduce the fresh air so that stuffiness or smells arise.
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Most air conditioning units have （） for adjusting the ratio of recirculated fresh airCare must be taken not to reduce the fresh air so that stuffiness or smells arise.
A、catch plates
B、dampers
C、regulating valves
D、fa
时间：2022-01-01 12:39
关键词：
船舶辅助机械
答案解析
B
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