| 摘要 |
An improvement is provided for combination with a pool jet head receptacle attachable to pool wall structure, the receptacle having an open top, an open bottom, and an internal thread. The improvement comprises: (a) an attachment in the form of a body receivable downwardly into the receptacle, (b) external threading on the body to rotatably attach to the receptacle thread, (c) a head on the body to close the receptacle open top, (d) and manipulable structure on the top of the head, that structure taking one of several forms.
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