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[터널] 지하철터널-서울지하철 9호선 921공구

[터널] 지하철터널-서울지하철 9호선 921공구

sean2masaaki(70)

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Sunday, March 4, 2018 11:47 PM

올림픽공원 하부 통과구간. EPB Type TBM. :)

Sunday, March 4, 2018 11:47 PM

sean2masaaki(70)

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