“pentice”的概念、定义、翻译、参考文献-科学参考

单词	pentice
释义	pentice [`pen·tǝs] ^{MINING ENGINEERING} 1. A rock pillar left, or a heavy timber bulkhead placed, in the bottom of a deep shaft of two or more compartments; the shaft is then further sunk through the pentice. 2. In shaft sinking, a solid rock pillar left in the bottom of the shaft for overhead protection of miners while the shaft is being extended by sinking.
随便看	four-wire circuit four-wire line four-wire repeater four-wire subscriber line four-wire terminating set fovea fovea centralis foveal vision foveola foveolate fowan fowl Fowler-DuBridge theory Fowler function fowlerite fowl pox ottoman otto of rose oil ottrelite O-type backward-wave oscillator O-type carcinotron O-type star ouabain ouachitite ouari

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