@allsmom007: Why were there seams on the tracks in the past, and now there are no seams left? Will the tracks bend due to thermal expansion and contraction?

Allsmom
Allsmom
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Thursday 17 September 2026 13:56:21 GMT
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jimouyang62
用户8339782420820 :
讲述的好
2026-09-17 22:11:54
0
user6154963099610
姜義政 :
😁😁😁
2026-09-17 23:09:43
0
kaoandpao
哩厚 :
[無辜][無辜][無辜]
2026-09-17 20:11:27
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user8562787356227
傅傳炎 :
😳😳😳
2026-09-17 18:33:51
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weiwei7427
weiwei :
😳😳😳
2026-09-17 23:32:39
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