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

翻译：As it expends it rises in the take -the height to wh...

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.

翻译：The most common means measuring rate of flow of a fl...

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.

翻译：There are special types of valves designed to be ope...

问答题翻译：There are special types of valves designed to be operated by control instrument rather than by hand.