1·The olefins, such as ethylene and propylene, are formed from petroleum gas or from cracking of larger hydrocarbons. Ethylene is used to make polyethylene e.g.
烯烃主要是来自石油气或大分子的碳氢化合物裂解，如乙烯，丙烯。
2·Yunnan locate in plateau, engine inflate efficiency drop, liquefied petroleum gas device and engine mismatch, lack the essential plateau and adjust the technological scheme.
云南地处高原，发动机充气效率下降，而且液化石油气装置与发动机不匹配，缺乏必要的高原调整技术方案。
3·In this paper, improvement of technology and catalyst are reported in ARGG technology installation. The petroleum gas of rich propylene and gasoline of high octane number are obtained.
ARGG技术在普通催化、裂化工艺装置上的应用。通过对工艺、设备和催化剂的改进工作，可以多产富含丙烯的液化石油气和高辛烷值汽油。
4·Less commonly, liquefied petroleum gas, alcohol, and foamed fluid are used.
较不常用的有液化石油气、醇和泡沫压裂液。
5·Propylene, the common petroleum gas, is subject to gasification under heating and liquification under pressure.
丙烯是一种受热易气化、受压易液化的常用石油气。