Since the mid-20th century, the rapid development of oil processing technology meters, followed by petrochemicals have made significant progress in depth and breadth.
Since the middle of the 20th century, the rapid development of petroleum processing technology, with which petrochemicals have developed greatly in depth and breadth.
Since the middle of the 20th century, petroleum processing technology has developed rapidly, with the development of Petrochemistry in depth and breadth.<br>