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2013-07-31

Railway applications - Direct current signalling relays; German version EN 50578:2013
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2013-12-01

Draft Document - Railway applications - Direct current signalling relays; German version prEN 50578:2012
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2012-07-01

Railway applications - Direct current signalling monostable relays - Part 2: Spring type relays
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2019-08-16

Railway applications - Direct current signalling monostable relays of type N and type C
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2015-07-24