• At first Gingerich thought the two bones were the single-pulley astragali from the animal's left and right legs-proof that he'd been right about the origin of whales.

    起先,金格·里奇还以为骨头分别来自动物左右单滑轮踝骨——这也能证明之前鲸起源推测是正确

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  • The hopper elevator is a kind of single bucket elevator, which is composed of a hopper, a rail and a bracket, a traction winch and a pulley.

    料斗升降机起重机械中的提升的升降机,一般带走轮料斗、轨道及其支架牵引绞车滑轮组成。

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  • The hopper elevator is a kind of single bucket elevator, which is composed of a hopper, a rail and a bracket, a traction winch and a pulley.

    料斗升降机起重机械中的提升的升降机,一般带走轮料斗、轨道及其支架牵引绞车滑轮组成。

    youdao

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