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.

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.

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.

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

问答题翻译：As it expends it rises in the take -the height to which it rises is calibrated to indicate to indicate temperature.

问答题翻译：The most common means measuring rate of flow of a fluid is based on the principle that if there is a contraction or constriction (a section of reduced diamater) in a pipe,the pressure of a fluid flowing down-stream from the contraction will be lower than that up-stream from the contraction.