dalam perbaikan
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Gotthard Base Tunnel dengan panjang 57 km (35.4 mil) adalah terowongan kereta api terpanjang di dunia dan akan dibuka pada tahun 2017 di bawah Alpen di Swiss. Untuk tabung bagian timur akhirnya tercapai pada Jumat 15 Oktober 2010. Agan dapat membaca lebih lanjut tentang terowongan di sini.
Cekidot :
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