“roof jack”的概念、定义、翻译、参考文献-科学参考

单词	roof jack
释义	roof jack [`rüf ´jak] ^{MINING ENGINEERING} A screw- or pump-type extension post used as a temporary roof support.
随便看	minimum-access routine minimum-altitude bombing minimum bend radius minimum configuration 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

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