标准号:ANSI IT7.222-1989(R1997)
中文标准名称:视听系统。高架投影机。胶卷、胶片芯和胶片卷绕机的尺寸
英文标准名称:Audiovisual Systems - Overhead Projectors - Film Rolls, Cores and Winders - Dimensions Reaffirmation and Redesignation of ANSI /ISO 7943.3-1987 (R1992); ANSI/NAPM IT7.222-1989(R1994); ISO 7943.3-1987(R1997