
Bs En 13230-4 - Railway Applications - Track - Concrete Sleepers And Bearers - Part 4: Prestressed Bearers For Switches And Crossings
出版:British Standards Institution

專家解讀視頻
DRAFT JULY 2007 [20/07/2007]
? British Standards Institution 2013
General notes:
This Draft for Public Comment is no longer current as its expiry date for comments has passed. It is not available for order.
PREN 13230-4:2014 - Identical