“natural bridge”的概念、定义、翻译、参考文献-科学参考

单词	natural bridge
释义	natural bridge Encyclopedia 工学风景名胜资源释 natural bridge天生桥地下河与溶洞的顶板崩塌后，由残留部分的两端与地面连接而中间悬空的桥状地形。
随便看	casing casing centralizer casing connection head casing drilling casing drilling special bit casing firing casing for stress release casing head casing milling casing of centrifugal compressor casing oil spillage of oil and water wells casing paper wet lay nonwoven casing plastic tools casing power tong casing pressure measurement casing pressure test casing program casing section milling casing swage casing test casing tongs casing treatment casing-tubing annulus casing unfreezing cask-flask

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