track bed (Q4076722)
structure on railway lines supporting (in some cases, sleepers and) rails
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other details
aliases track ballast
 Track bed
 trackbed
 ballast bed
description structure on railway lines supporting (in some cases, sleepers and) rails

External Links
(P646) /m/09476_
(P2671) /g/121whzcc
/g/122lq225
(P6366) 2777992197