andon
C2CEFR level
93/100Rarity: very rare
TechnicalRegister
A visual alert system that lets workers flag a problem on the line so it can be addressed at once.
When an operator pulls the andon cord, the line stops and the team leader comes to the station.
Rarity runs from 0 (a word everyone knows) to 100 (almost never seen outside specialist or literary writing). Level is the word's real difficulty on the CEFR scale, from A1 to C2.
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