ERM fieldwork -mine air intake facility from 100 meters

Name: ERM fieldwork -mine air intake facility from 100 meters
Uploaded: 2026-08-18T14:07:38
Duration: 165 s
Description: ERM fieldwork -mine air intake facility from 100 meters - ERM fieldwork -mine air intake facility from 100 meters by john grzinich (02.07.2010 14:45) [CC-BY-SA]

🕐 2026-08-18 14:07:38 ▶ 1 次播放 ❤️ 0 点赞

ERM fieldwork -mine air intake facility from 100 meters - ERM fieldwork -mine air intake facility from 100 meters by john grzinich (02.07.2010 14:45) [CC-BY-SA]

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ERM fieldwork -mine air intake facility from 100 meters

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