国际标准摄影术已显影处理安全摄影胶片的储存方法（续）附录Ａ（参考件）储存拷贝和工作拷贝之间的差别储存的摄影胶片和使用的胶片之间的差别有时并不是很清楚。工作拷贝即使用拷贝片是图书馆或资料中心的主要摄影记录。它们的价值在于随时可以提供查阅。但是，这种利用... International standard photography Developed to handle the storage of transparencies (continued) Appendix A (Reference) Differences between stored copies and working copies Sometimes it is not clear what is the difference between a stored photographic film and the film used. Working copy ie use of copy film is the main photographic record of a library or data center. Their value is that they are readily available for inspection. However, this use ...