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

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。

youdao

It is pointed that the oil-gas recovery technology is a systematic engineering. The design and election of oil-gas gathering units and recovery system are of the same importance.

油气回收技术是一个系统工程，在设计和选型时，应该注意油气收集系统和油气回收装置的同等重要性。

youdao