• The development process, technical parameters, structure and performance features of D17A well car are expounded.

    阐述了D17A型落下孔车的研制过程、技术参数、结构、性能特点,介绍了该车的试验和运用情况。

    youdao

  • The development process, technical parameters, structure and performance features of D17A well car are expounded.

    阐述了D17A型落下孔车的研制过程、技术参数、结构、性能特点,介绍了该车的试验和运用情况。

    youdao

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