The multiple-plate rolling method is used on plate mill at Shougang Co, including single-plate rolling mode, two-plate one-holding one-rolling mode and three-plate two-holding one-rolling mode.
Marey invented a technique called "chronophotography" that captured the stages of movement on a single photographic plate, with multiple exposures per second so that the moving figures overlap.
Marching to the capacity of the battery, multiple parallel plate separation, positive and negative horizontal welding into positive and negative plate group.