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on construction procedure and mechanical to obtain, in a drinking straw for drinks, a sudden folding
on construction procedure and mechanical to obtain, in a drinking straw for drinks, a sudden folding
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机译:关于施工程序和机械的问题,以便在饮用吸管中突然折叠
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摘要
The present invention concerns the procedure and relevant mechanical execution to obtain the folding section of a plastic drinking straw, by means of a series of small circular grooves, parallel to each other. The grooves are obtained by making use of a technological procedure similar to rolling.
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