Another add a filter processing to remove oil steam is need, it depends on the capacity of compressed air and oil steam content in the air.

另增设一道过滤处理以除去油蒸气是需要的，这取决于压缩空气的处理量以及空气中的油蒸气含量。

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That's a fundamental change from the late 1990s, when oil companies like BP and ExxonMobil owned big petrochemical operations that tended to add capacity at the worst possible time.

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