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DIN EN 12321:2009
Underground mining machinery - Specification for the safety requirements of armoured face conveyors; German version EN 12321:2003+A1:2009
This European Standard specifies the safety requirements for armoured face conveyors and covers, conveyor drive units, return units, line pans, chain assemblies, devices for tensioning and locking chains.
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Deutsches Institut für Normung [din]