国家地理 极限维修大挑战 费城的超级公交系统 National Geographic Worlds Toughest Fixes Philly Mega Tra

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资源信息： 中文名: 国家地理 极限维修大挑战 费城的超级公交系统 英文名: National Geographic Worlds Toughest Fixes Philly Mega Transit 资源格式: 720P 发行时间: 2010年 制作发行: National Geographic 地区: 美国 语言: 英语 概述:

节目走进美国第五大的公共交通系统——费城的SEPTA，了解这里的2200英里的轨道是如何运转的。节目中，极限维修小队需置换一段80年历史的三英里长的高压电线。（文：life_is_good@YDY） WTF rides the rails in the City of Brotherly Love. While there, Riley teams up with crews of the nation's fifth largest public transportation system, Philadelphia's SEPTA, to find out what it takes to keep 2,200 miles of tracks safely running. The team must replace a three-mile section of 80-year-old high-voltage wire. It's a risky operation, with live wires just an arms reach away. Then, Riley heads to the garage to work on a train with a malfunctioning automatic control system. Read more: http://channel.nationalgeographic.com/seri...n36xnN2W