Internet Archive - national geographic mega machines diamond diggers 2005 (2005)

财富辛

Title: National Geographic: Mega Machines - Diamond Diggers
Source: Internet Archive (Archive.org)

English Introduction:
A National Geographic engineering documentary introducing large extraction equipment, mining engineering, and field operations.

中文标题：
《国家地理：巨型机器——钻石采掘》

中文简介：
国家地理工程纪录片，介绍大型采掘设备、矿业工程与现场作业流程。

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