| 摘要 |
An irrigation tube having a polymer peripheral wall can be constructed so that the peripheral wall is composed of an even number greater than 2 of substantially rigid panels connected at their side edges by the same number of line like flexible areas. Water flow from such a tube can be regulated through the use of holes in such panels of various different shapes. Because of the use of such panels and line like areas the tube can be easily collapsed to a lay flat configuration in which it can be easily coiled, stored and handled until it is used and can be easily expanded to a normal configuration when it is used.
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