| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an irrigation system for irrigating a growing medium. <P>SOLUTION: The irrigation system includes a helical tubular hydrophilic membrane or a corrugated tubular hydrophilic membrane, wherein a greater or lesser irrigation density can be obtained by controlling variable surface area for pervaporation by increasing or decreasing the surface area of hydrophilic membrane with a desired helical shape which membrane is used in any particular enclosed space. <P>COPYRIGHT: (C)2013,JPO&INPIT |
