Why It's Unique: Employees clocking in at the complextake a daily commute down a roughly 2000-foot tunnel, traveling througha few 25-ton blast doors along the way.
独特之处: 员工每天上下班要通过大约2000英尺的隧道向下,经过数道25吨的防爆门。
Why It's Unique: With a 76-foot diameter, Yerba BuenaIsland Tunnel is the world's widest single-bore tunnel, an impressivefeat considering it opened in November of 1936.
独特之处: 直径达76英尺的耶尔瓦布埃纳岛隧道是世界上最宽的单孔隧道,1936年11月,这项令人印象深刻的工程落成开通。
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