This International Standard specifies the connection of 16 mm microfilm with images to 35 mm reel microfilm. This standard applies to the connection of 16mm and 35mm roll microfilm with images.
GB/T 12355-1990 history
2008GB/T 12355-2008 Micrographics-Splices of microfilm with image.Dimensions and operational constraints
1990GB/T 12355-1990 Micrographics--Splices of microfilm with image