B2emergency stop device
A safety mechanism, usually a button, to halt machinery quickly
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B2B2emergency stop device
Device for immediate, urgent machine shutdown
C1👐expansion-shell anchor bolt
A bolt designed to expand within a hole for anchoring
A1👐external entrance door
A movable barrier used to open or close an entrance
A2external wall
Outer surface of a building
B1external wall
Outer vertical surface of a building
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