标准介绍
GB/T 21111-2007室内放映 透射放映银幕的分类和亮度测定最新版内容查询,英语名称Projection in indoor rooms - Classification of transmitting projection screens and measurement of their transmitted luminance levels,发布日期:2007-10-11,实施日期:2007-12-01,GB/T21111-2007室内放映透射放映银幕的分类和亮度测定国家标准最新版免费下载
最新评论