| 摘要 |
<p>This invention relates to an apparatus for distributing liquid in the form of film within vertical tubes. The apparatus is constituted by a solid cylindrical member inserted as a plug into each tube at the upper end thereof. Said member is provided with an upper ledge, a lower cavity forming a circular rim at its base, and helical outer grooves extending also in the ledge and having a depth less than the thickness of said rim.</p> |
