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The rotation of the solid unit cohesion nine pultong Stationery
The rotation of the solid unit cohesion nine pultong Stationery
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机译：旋转的固体单位凝聚力九普通文具
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摘要
Defective in the present design is when bound to a solid pool inside pultong a rotation sphere to rise or fall in pultong, conventional coupling parts broken as a coupling device having a novel structure capable of binding ganpyeonhi with little force without damage to the mutually These coupling portion intended to eliminate the causes severe problems, the subject innovation is characterized by the coupling device is displaced by expansion and contraction to form a plurality of recess and the elastic pieces by dividing the entire inner end of the coupling ball at a predetermined interval as possible.
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