单词	bull stick
释义	bull stick noun : a lever used in lieu of a bull wheel to swing a derrick into position to pick up its load Word History Etymology bull (wheel)
随便看	dutuburi duty duty bound duty mark duty plate duty roster duty to retreat duty-free duumvir duumvirate duumvirates duumvirs Duvalier duvet duvetines duvets duvetyn duvetynes duvetyns Duwamish duwamishes dux dux fe dux femina facti duxelles

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