指出三类热泵中塔顶气相直接压缩式热泵的能耗最小。

And it is pointed out that vapor recompression heat pump consumes the fewest energy among the three kinds heat pumps.

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工艺上用的，石油是塔顶气(常减压)，化工是丁二烯装置，火炬气回收系统，石油和化工均采用过。

In the process, oil is top gas (often reduced pressure), chemical is butadiene unit, the torch gas recovery system, oil and chemical are used.

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我们一口气爬上塔顶，发现来自世界各地的游客都在那里照相。

We went all the way to the top. There were visitors from all over the world taking photos ther...

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