一个例子是，这是向建立一个与冷气楼上和无条件的地下室密封舱口。
One example is this hatch that was made to create a seal between the conditioned air upstairs and the unconditioned basement.
一个例子是，这是向建立一个与冷气楼上和无条件的地下室密封舱口。
One example is this hatch that was made to create a seal between the conditioned air upstairs and the unconditioned basement.
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