Earth borers are huge, amazing tools that help build tunnels. Readers will dig deep underground with these massive machines to learn how they chew up rocks and dirt and help engineers build new things far below Earth’s surface. Vibrant full-color photographs showcase these large borers and the tunnels they create, which are used by cars, trucks, and even trains to take people from place to place. This innovative title also looks at the environmental impact these machines have on our lives and potential problems they cause, such as sinkholes.
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语言 英语 ● 格式 PDF ● 网页 32 ● ISBN 9781482457865 ● 出版者 Gareth Stevens Publishing LLLP ● 发布时间 2016 ● 下载 3 时 ● 货币 EUR ● ID 6899791 ● 复制保护 Adobe DRM
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