세계 최대의 굴삭기들 VIDEO: The World's Largest Giant Digging Excavators At A New High Level| How Giant Tunnelling Machines Work

The World's Largest Giant Digging Excavators At A New High Level| How Giant Tunnelling Machines Work

via youtube

5:37 Tesmec Digging Excavators

6:10 Komatsu Continuous Miner

7:27 Bucket-wheel Excavator 258

10:02 Giant Ground Drilling Machine

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