1　范围本标准规定了 35ｍｍ非变形画面以及变形画面影片 (银幕画面横向扩展比为 2 ,宽高比为2 .35)上最大可放映画面的位置和尺寸。2　引用标准下列标准所包含的条文 ,通过在本标准中引用而构成为本标准的条文。本标准出版时 ,所示版本均为有效。所有标准都会被修订 ,使用本标 1 Scope This standard specifies the position and size of 35mm non-deformation of the screen and the deformation of the screen video (the screen aspect ratio of 2, aspect ratio of 2.35) can be displayed on the screen. 2 Normative references The following standards contain provisions which, through reference in this text, constitute the provisions of this standard. At the time of publication, the editions indicated were valid. All standards will be revised, the use of this standard