Most commercial helium is recovered from natural gas through a cryogenic separation process.
大多数商用氦是通过一种低温分离过程从天然气中回收的。
Based on the cryogenic technology, a new flow sheet for air separation system is built.
基于深冷技术，建立了一个新的空分系统流程。
Based on the cryogenic technology, a new flow sheet for air separation system is built.
基于深冷技术，建立了一个新的空分系统流程。
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