Petrochemical industry Results list

    • Petrochemical
    • Petrochemical industry

      Petroleum is one of the main objects of geological exploration, it is a viscous, dark brown liquid called "industrial blood." There is oil storage in parts of the upper crust. The main components of petroleum are mixtures of various alkanes, cycloalkanes, and aromatic hydrocarbons. The oil-forming mechanism of petroleum has two theories of bio-deposition and petrochemical oil. The former is widely accepted. It is considered that petroleum is formed through a long-term evolution of organisms in ancient oceans or lakes. It belongs to bio-deposition oil, and cannot be regenerated. However, another theory is that petroleum is produced by the carbon itself in the earth's crust, and is not related to living things and can be regenerated. Petroleum is mainly used as fuel and gasoline, and is also a raw material for many chemical industrial products such as solutions, fertilizers, pesticides and plastics.

    Engineering performance

    久久久久人妻一区精品色| 国产精品视频一区国模私拍 | 色妞ww精品视频7777| 国产成人精品日本亚洲直接| 99久久精品无码一区二区毛片 | 国产精品无码DVD在线观看| 业余自由性别视频视频| 久久精品www人人爽人人| 亚洲综合精品一二三区在线| 久久久久人妻精品一区三寸蜜桃| 亚洲精品成人片在线播放| 久久青草国产精品一区| 日本一区二区三区精品国产| 精品一区二区三区在线成人| 91精品婷婷国产综合久久| 亚洲欧美日韩国产成人精品影院| 国产成人A人亚洲精品无码| 久久成人国产精品一区二区| 久久精品国产亚洲AV香蕉| 国产精品久久久天天影视香蕉 | 欧美精品国产精品| 四虎亚洲国产成人久久精品| 精品爆乳一区二区三区无码av| 国产精品视频九九九| 久久久久久亚洲Av无码精品专口| 国产高清日韩精品欧美激情| 把女的下面扒开添视频| 91精品国产综合久久四虎久久无码一级 | 亚洲欧美国产精品第1页 | 色偷偷88欧美精品久久久| 精品午夜福利在线观看| 国产精品尹人在线观看| 狼色精品人妻在线视频| 精品精品国产欧美在线小说区| 久久精品中文字幕无码绿巨人| 九九久久精品国产| 国产精品内射后入合集| 欧美久久久久久午夜精品| 国产成人精品免费视| 影音先锋精品视频| 国产成人精品无人区一区|