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Guoliang Tunnel in Taihang mountains, Shanxi, China
Guoliang Tunnel in Taihang mountains, Shanxi, China

size: 969871
sha1: ca49e10b91ab1d1f81ea9549afb53acdb2340154
sha256: d28bb69bf27a8bcfc61873f4f0e6388cbba225731c957f2e7d7e7c4657576a31


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size: 960269
sha1: 572d94b802b5228613cf71c45f89ff1e59a2e669
sha256: 496727e4ea23ec2f624dec456c3a5ca30c77860a7159d77d20f423ee747ea73b

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