ਪੈਟਰੋਲੀਅਮ ਦੇ ਵੱਖ-ਵੱਖ ਘਟਕਾਂ ਨੂੰ ਵੱਖ ਕਰਨ ਦਾ ਪ੍ਰਕਰਮ
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Process of separation of different constituents from petroleum is called
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process of separation of different constituents from petroleum is called Refining.
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