2014JB/T 8259.1-2014 Overhead projectors.Part 1: Film rolls, cores and winders.Dimensions
1999JB/T 8259.3-1999 Overhead projectors film rolls, cores and winders dimensions
0000 JB/T 8259.3-1995
JB/T 8259.3-1999 Overhead projectors film rolls, cores and winders dimensions was changed to JB/T 8259.1-2014 Overhead projectors.Part 1: Film rolls, cores and winders.Dimensions.