The article introduced gas pipelines GIS system's composing, function, applied conditions and matters which should be pay attention to on construction and run process.

介绍了燃气管网GIS系统组成、功能及应用情况，同时介绍了GIS建设及运行过程中应该注意的事项。

Injections were introduced in 1978 as a supposedly more humane alternative to other forms of capital punishment-hanging, firing squad, electrocution and the gas chamber.

1978年，注射式死刑作为一种相较于绞杀、射杀、电刑以及毒气室等执行死刑的手段更为人道的选择方案而引入美国。

Reformation of nitrogen seal of blast furnace gas compressor is introduced.

介绍了高炉煤气压缩机采用氮气密封的改造。