“sprag road”的概念、定义、翻译、参考文献-科学参考

单词	sprag road
释义	sprag road [`sprag ´rōd] ^{MINING ENGINEERING} A road so steep that sprags must be used on the wheels of ore cars during descent.
随便看	French drain French measles French polish Frenet-Serret formulas Frenkel defect Frenkel exciton Frenkel-Halsey-Hill isotherm equation Frenkel pair frenulum frenum frequency frequency agility frequency allocation frequency analysis frequency analyzer frequency-azimuth intensity frequency band frequency bridge frequency carrier system frequency changer frequency-changer station frequency characteristic frequency coding frequency compensation frequency conversion

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