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By certification 
Total requirements:
1. Type: The motor drives the chain to pull up, with counterweights.
2. Length: 5800mm
3. Width: 4400mm.
4. Height: 5900mm (see plan view).
5. Conveying speed: 25m/min; lifting speed: 20m/min.
6. Supporting four-sided centered institutions.
7. The average time required for stacking a mattress (the maximum height of the stack is 2.15 meters including the tray): (20 seconds) (calculated based on the maximum 400mm mattress)
8. The stacker must include an alarm device for height and width overruns.
http://www.mattressrobot.com/
