| 摘要 |
In the ground surface drainage apparatus, a monolithic catch basin has a side outlet from which drain water can flow. The catch basin is tubular, with an open top. Interiorly of the catch basin, below the open top, is a stop. A vertical extension pipe of selectable length is inserted into the catch basin down to the stop and extends up to near the ground surface. A grate rests in the top of the upright extension. All parts preferably are made of synthetic polymer composition material.
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