| 摘要 |
In one embodiment, the invention provides a device including a first tubular member having a first diameter, the first tubular member including a first end having an attachment device for attaching the first tubular member to a fluid supply, a second end, and a perforated surface between the first end and the second end, and a second tubular member having a second diameter less than the first diameter, the second tubular member including, a first end, a second end, and a perforated surface between the first end and the second end, wherein the second tubular member is adapted to reside within the first tubular member. |
