“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	hadronic atom hadrosaur Hadsel mill Haeckel's law haematodocha Haemobartonella Haemophilus Haemosporina haerangium HAF black haff Hafnia hafnium hafnium carbide Haftplatte Hageman factor Hagen-Poiseuille law Hagen-Rubens relation hagfish Haggenmacher equation H agglutinin Hahn-Banach extension theorem Hahn decomposition Hahnemannism hahnium

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