| 摘要 |
A unit that directs water and air to roots of a plant includes a hollow sleeve having a wall member that defines an internal cavity therein with an open top and an open bottom. The unit has at least one hole formed in the wall member. The unit further includes an emitter having a first end and a second end, the first end being disposed through a selected hole in the wall member and being engaged to the wall member and a conduit coupled to the second end of the emitter.
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