简介：In Iceland, a giant tunnel boring machine called 'Jaws' has chewed up nine miles of basalt to aid a hydroelectric project. See the rock cruncher at work as it burrows deep down.爱华影视为您提供《伟大工程巡礼：巨大挖掘机》免费在线观看，及播出时间。喜欢的话，不要忘记分享给好友哦！
简介：In Iceland, a giant tunnel boring machine called 'Jaws' has chewed up nine miles of basalt to aid a hydroelectric project. See the rock cruncher at work as it burrows deep down.
