“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	minimum-delay coding minimum detectable signal minimum deviation minimum discernible signal minimum distance minimum-distance code minimum ebb minimum elevation minimum enroute instrument altitude minimum firing current minimum flight altitude minimum flood minimum frontal diameter minimum ionizing speed minimum-latency coding minimum-latency programming minimum-latency routine minimum lethal dose minimum-loss attenuator minimum-loss matching minimum-loss pad minimum metal condition minimum-modulus theorem minimum-phase system minimum range

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