The gas , which is sulphur - free , contains 89 - 99 % methane, up to 6 % ethane, and 3 % propane.天然气不含硫, 含甲烷88-99%, 乙烷6%和丙烷3%.The method and the condition of separation epoxy ethane from dihydric alcohol are described.介...
Ugandan president vows to invest in long - term goals to benefit future generations with prospective oil wealth.乌干达总统誓言发展 长期 目标,以可观的石油资源利益后代.In fact, just 1,600 Ugandan troops have shown up.事实上, 仅1600名乌干达维和士兵出现.The Ugand...