Not sure - more details soon.

Date: 2012-04-27
Owner: Gallery Administrator
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821 Vent valve is used to vent brake pipe air on the locomotive locally at a high flow rate to ensure that a rapid reduction of brake pipe air is transmitted to the
following cars when emergency brakes are applied.
Posted by Harsh Vardhan on 2012 Apr 28 03:16:18 +0100
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