if a tunnel goes thru a moutain, do the realrailroads really use portals as in model railroading??? it would seem to me that the portals serve only esthetic purposes, posing no structural support at all…
if a tunnel goes thru a moutain, do the realrailroads really use portals as in model railroading??? it would seem to me that the portals serve only esthetic purposes, posing no structural support at all…