“crown block”的概念、定义、翻译、参考文献-科学参考

单词	crown block
释义	crown block Encyclopedia 工学钻井装备释 crown block天车安装在石油钻机井架顶部，用于钻井钢丝绳的悬挂和导向、钻井工具的起吊等作业过程的定滑轮组。
随便看	multivalence multivalency multivalent multivalent function multivalent mapping multivalent vaccine multivalue multivalued multivalued accretive operator multivalued analytic function multivalued cohomology operation multivalued decision multivalued dependency multivalued differential equation multivalue dependency multivalue dependency, MVD multivalued function multivalued functional multi-valued functional dependency multivalued function mapping multivalued linear operator multivalued logic multivalued mapping multivalued negation multivaluedness

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