오버헤드 영사기의 해상력 시험 표준판
测试架空投影机透明胶片

1991-07-05

Test transparencies for overhead projectors
测试投影仪的透明度

1990-01-01

Slide projectors and slides; overhead projectors; transparent films, transparencies, projection aids
幻灯片放映机和幻灯片；高架投影仪；透明胶片、透明胶片、投影辅助设备

1988-12-01

Фотография. Графопроекторы. Диакарты и рамки для них. Размеры
摄影 架空投影机透明胶片和透明框架 尺寸

透射式投影器 第2部分：投影片和投影片框 尺寸
Overhead projectors - Part 2:Transparencies and transparency frames - Dimensions

2014-05-12

Audiovisual Systems - Overhead Projectors with 254 X 254 mm (10 X 10 in) Stage - Test Transparency
视听系统.带254 X 254 mm（10 X 10 in）舞台的高架投影仪.透明度试验

1994-01-01

透射式投影器 可靠性要求及试验方法
Reliability requirements and test methods of overhead projectors

2014-05-12

250mm×250mm透射式投影画面检验版
250mm×250mm test target for overhead projector

2014-05-12

透射式投影器 画面畸变测试版技术条件
Technical specifications of screen distortion test target for overhead projectors

2014-05-06