• The binding mechanism includes one base suitable for being fixed to cover and one paper holder comprising two passage parts and two pin parts held in the passage parts separately.

    发明公开了装订装置,其包括基座,其适于固定封皮上;

    youdao

  • The binding mechanism includes one base suitable for being fixed to cover and one paper holder comprising two passage parts and two pin parts held in the passage parts separately.

    发明公开了装订装置,其包括基座,其适于固定封皮上;

    youdao

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