Practical Engineering<\/a> on YouTube.<\/p>\n <\/p>\n
<\/p>\n","protected":false},"excerpt":{"rendered":"
Ever wonder how tunnels are built so they don’t collapse? The answers might surprise you. In this video you’ll learn how intelligent, yet simple reinforcement prevents tunnels from collapsing. Source:\u00a0Practical Engineering on YouTube. <\/p>\n","protected":false},"author":1,"featured_media":2303,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"video","meta":{"footnotes":""},"categories":[7],"tags":[],"yoast_head":"\n
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