“gravel”的概念、定义、翻译、参考文献-科学参考

单词	gravel
释义	gravel 砾砾石砂砾
随便看	locking bed (火车车架上的) locking blade lock(ing) bolt locking bolt locking box locking buckle locking cam locking cap locking circuit locking clip locking clutch locking cock locking coil locking collar locking cone locking control locking control voltage locking course locking crank locking cross bar locking cylinder locking device locking dog lock in gear locking escape

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