| 摘要 |
An cover of an opening unit is provided to reduce manufacturing cost by simplifying the constitution of the opening unit cover and to help a user to easily recognize the cover of the opening unit by making out of plastic with various fluorescence color. An opening unit comprises a cover(10b) provided with a combining groove(13b) forming a projected end(12) at both sides of a circular space unit(11); and a fixing member provided with a cutting unit formed at both side of a combining shaft combined to the combining groove; a fixing unit formed at the lower side, and a hooking unit at the upper side.
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