求翻译：长期以来人类根据不同的测量原理，研制出各种不同的流量计，由于工业自动化水平的提高以及生产规模的扩大，对流量计的要求也越来越高，对流量的集中监测，形成流量测控系统的要求也日益迫切。是什么意思？

Mankind has long been based on different measurement principles, developed a variety of flowmeter due to raising the level of industrial automation and expansion of production scale, higher and higher demands on the flowmeter, the centralized monitoring of the flow, forming the flow measurement The

Long-term human based on different measurement principle, the development of a variety of different flow meter, due to industrial automation level of the expansion of the scale of production, as well as to the flow meter, and there are increasingly high demands on the centralized monitoring traffic

Since long ago the humanity acts according to the different survey principle, develops each kind of different flowmeter, as a result of the industrial automation level enhancement as well as the scale of production expansion, the counter-flow gauge request more and more is also high, to the current

Long time humans according to different measuring principle, developed a variety of flow meters, due to the improvement of industrial automation and expansion of production scale, requirements for flow meter is getting higher and higher, centralized monitoring of flows, forming requirements for flow

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