简答题 翻译：As is well known gas mixture do not follow the simple gad laws but deviate from them when place under pressure.

翻译：As more and more ethane and propane are extracted fo...

问答题翻译：As more and more ethane and propane are extracted form natural gas, the control of the But or heating content of gas becomes mere important.

翻译：In other countries products pipelines may move refin...

问答题翻译：In other countries products pipelines may move refined products from coustal refinery or tanker unloading terminals to the interior of the country to supply populated areas.

翻译：Products pipeline can often carry serveral different...

问答题翻译：Products pipeline can often carry serveral different products in the same pipeline.