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 of valves that are installed on board United States Navy vessels.

• 美国海军部件控制中心采用认可部件清单(APL)，鉴定编号(CID)和美国国家库存编号来订购安装在美国海军船舶上的更换阀门或阀门部件。