6 ms·
The rails are welded together (https://en.wikipedia.org/wiki/Exothermic_welding https://en.wikipedia.org/wiki/Exothermic_welding), so there are no joins.
by joushx 9mo ago
The rails are welded together (https://en.wikipedia.org/wiki/Exothermic_welding https://en.wikipedia.org/wiki/Exothermic_welding), so there are no joins.
- lcuff 9mo agoInteresting. I wonder how the expansion and contraction of the rails with changes in temperature is accommodated.