Here’s what is blocking Bertha, the world’s largest tunneling machine

2 点作者 vbv超过 11 年前

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vbv超过 11 年前

This is in relation to the previous post: <a href="https://news.ycombinator.com/item?id=6939710" rel="nofollow">https://news.ycombinator.com/item?id=6939710</a>