These provide a plenum for air to circulate below the floor, as part of the air conditioning system, as well as providing space for power cabling .
这些提供了全会的空气流通低于楼的一部分，空调系统，以及提供空间，电力电缆。
These provide a plenum for air to circulate below the floor, as part of the air conditioning system, as well as providing space for power cabling .
这些提供了全会的空气流通低于楼的一部分，空调系统，以及提供空间，电力电缆。
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