“hard-rock mine”的概念、定义、翻译、参考文献-科学参考

单词	hard-rock mine
释义	hard-rock mine [`härd ¦räk `mīn] ^{MINING ENGINEERING} A mine located in hard rock, especially a mine difficult to drill, blast, and square up.
随便看	single-layer bit single-layer solenoid single-length single lens single-loop feedback single-loop servomechanism single packing single-pass weld single-path system single-perforated grain single-phase single-phase circuit single-phase flow single-phase meter single-phase motor single-phase rectifier single-photon-emission computed tomography single-piece milling single-point grounding single-point tool single-polarity pulse single-polarity pulse-amplitude modulation single-pole double-throw single-pole single-throw single-precision number

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