01834nam 2200421 450 991015483610332120230810001450.01-63472-233-7(CKB)3710000000972138(MiAaPQ)EBC5155495(EXLCZ)99371000000097213820180506d2017 uy 0engurcnu||||||||txtrdacontentcrdamediacrrdacarrierTunnels /by Virginia Loh-HaganAnn Arbor :Cherry Lake Publishing,[2017]1 online resource (24 pages) illustrations21st century junior library. Extraordinary engineering1-63472-167-5 Includes bibliographical references and index.What are tunnels? -- How do soft ground tunnels work? -- How do rock tunnels work? -- How do underwater tunnels work? -- Try this!"The 21st Century Junior Library Extraordinary Engineering series explains how important feats of engineering are accomplished. Tunnels examines the engineering concepts that make these important structures possible. Sidebars encourage readers to engage in the material by asking deeper questions or conducting individual research. An activity, full color photos, a glossary, and a listing of additional resources all enhance the learning experience"--Provided by publisher.TunnelsJuvenile literatureTunnelsDesign and constructionJuvenile literatureTunnelsTunnelsDesign and construction624.193Loh-Hagan Virginia1225467MiAaPQMiAaPQMiAaPQBOOK9910154836103321Tunnels2886877UNINA