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介绍了美国有关部门为使航空航天和国防工业系统减少对供应商的重复审核和监督，提出并建立了国家合同商认可制度ＮａｔｉｏｎａｌＣｏｎｔｒａｃｔｏｒＡｃｃｒｅｄｉｔａｔｉｏｎＳｙｓｔｅｍ（ＮＣＡＳ）。
The relevant US Departments were introduced to establish a National Contractor Accreditation System (NCAS) for the review and supervision of suppliers for aerospace and defense industry systems.