The (APL) Allowance Parts List, (CID) Code Identification Numbers and (NSN) National Stock Numbers are used by the Navy in the Parts Control Center to order replacement valves or parts for valves that are installed on board United States Navy vessels.

 
  • 认可的配件清单(APL),规定的标志编号(CID)和美国国家采购编号(NSN)都是由美国海军配件调配中心使用,用来订购安装在美国海军船舶上,或用来更换阀门或阀门配件。
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