The BEA's classification does not include headquarters and research facilities, most of which are clustered in the state, according to Donald Grimes, an economist at the University of Michigan.
This classification is of several important value for research, design, production, sale, purchase, management, operation and service of medical facilities.
这种分类，对医疗设备的研究、设计、生产、销售、购置、管理、使用、维修均有意义。
3
This paper describes the necessity of taking water from reservoir surface and classification of reservoir surface intake facilities.