“quartz mine”的概念、定义、翻译、参考文献-科学参考

单词	quartz mine
释义	quartz mine [`kwȯrts ´mīn] ^{MINING ENGINEERING} A mine in which a valuable constituent, such as gold, is found in veins rather than in placers; so named because quartz is the chief accessory mineral in such deposits.
随便看	variable point variable radio-frequency radiosonde variable recoil variable reduction variable-reluctance microphone variable-reluctance pickup variable-reluctance stepper motor variable-reluctance transducer variable-resistance accelerometer variable resistor variable-sequence robot variable speech control variable-speed drive variable-speed generator variable-speed motor variable-speed scanning variable star variable-thickness microbridge variable-time fuse variable-transconductance circuit variable transformer variable visibility variable-volume air system variable waveguide attenuator variable-word-length

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