“portal crane”的概念、定义、翻译、参考文献-科学参考

单词	portal crane
释义	portal crane [`pȯrd·ǝl `krān] ^{MECHANICAL ENGINEERING} A jib crane carried on a four-legged portal built to run on rails.
随便看	douglasite Dounce homogenizer do-until structure douse douser Dovap Dove dove Dove prism dovetailing dovetail joint dovetail molding dovetail saw dowel dowel pin dowel plate dowel screw do-while structure down down by the head down by the stern downcast downcomer down cutting downcutting

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