thumb|ThyssenKrupp|Krupp coal stacker featuring tripper conveyor and non-slewing, luffing boom at RTCA Kestrel Mine|300px 300px|thumb|Stacker at Garzweiler surface mine
thumb|ThyssenKrupp|Krupp coal stacker featuring tripper conveyor and non-slewing, luffing boom at RTCA Kestrel Mine|300px 300px|thumb|Stacker at Garzweiler surface mine
A stacker is a large machine used in bulk material handling. Its function is to pile bulk material such as limestone, ores, coal and cereals onto a stockpile. A reclaimer can be used to recover the material.
Discovered by embedding cosine similarity (sentence-transformers MiniLM, 384-dim).