“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	shaping circuit shaping dies shaping network shapometer shard shared control unit shared file shared load shared logic shared-logic cluster word processor shared paranoid delusion shared resource shareware sharing device shark sharki shark liver oil shark oil sharkskin sharkskin pahoehoe shark-tooth projection sharp-crested weir sharp-cutoff tube sharp-edged gust sharpen

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