本发 明机器的特点在于，设有一空气再循环装置（10，12），用于至少部分 地将空气输送回机器腔（11，14-19）中。
The machine in the invention is characterized in: an air recirculation apparatus (10, 12) is disposed for conveying at least part of the air back to the machine cavity (11, 14-19).
合成氨装置应能够连续运行并稳定在70%的载荷下压缩机无需再循环。
The ammonia plant shall be able to run continuously and stable at 70% load without recycling in the compressors.
介绍了具有再循环系统的超音速汽液两相流升压装置，并对该装置的各种性能进行了理论计算及实验研究。
A theoretical calculation and experimental study is conducted of a supersonic steam liquid two phase flow pressure boosting unit, which incorporates a hot water recirculation system.
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