Bucket wheel reclaimer and bucket wheel stackable reclaimer, is the same concept? If not, what's the difference?

Stacker-reclaimer is generally equipment for homogenizing materials. Bucket-wheel reclaimer uses bucket wheel rotation to extract materials from the end face of the piled pile. This method of reclaiming has a poor homogenization effect. If it is to homogenize the stacking, it is not a bucket wheel type, but a movable cantilever stacking, or a belt conveyor with a dumper. The bucket wheel stacker and reclaimer you mentioned may be a stacker and reclaimer with bucket wheels at the cantilever end. This is generally not for homogenization, but only an unloading and reclaiming device.