“valve spanner”的概念、定义、翻译、参考文献-科学参考

单词	valve spanner
释义	valve spanner 气门扳手
随便看	first lower punch first lunar meridian first management step first market first meiotic division first melt first-melt ingot first member first meridian first milk first minor first molar first moment first-moment matrix first momnet of mass first mortgage bond first motion first motion direction first-motion drive first-motion hoist first-motion studies first-motion wave first nodal point first nodules first normal form

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