• 本文介绍一种在提拉中使用种劈形自紧固方

    A self-fastening method is introduced by which a cleat-shaped seed crystal is fixed in the swallow-tailed groove.

    youdao

  • 本文介绍一种在提拉中使用种劈形自紧固方

    A self-fastening method is introduced by which a cleat-shaped seed crystal is fixed in the swallow-tailed groove.

    youdao

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