“leapfrog system”的概念、定义、翻译、参考文献-科学参考

单词	leapfrog system
释义	leapfrog system [`lēp´fräg ´sis·tǝm] ^{MINING ENGINEERING} A system used in mining coal on a longwall face; self-advancing supports are used, with alternate supports advancing as each web of coal is removed.
随便看	bridged-T network bridge foundation bridge graft bridge house bridge hybrid bridge limiter bridge magnetic amplifier bridge oscillator bridge pier bridge plug bridge rectifier bridge trolley bridge vibration bridgewall bridgeware bridging bridging amplifier bridging connection bridging contacts bridging ligand bridging loss bridging material Bridgman anvil Bridgman effect Bridgman relation

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