| 摘要 |
An apparatus comprising an elongate member, a first arm, a second arm, a channel, and a cap. The elongate member has a first end and a second end. The first arm and the second arm extend from the first end. A space is present between the first arm and the second arm over the first end. The channel extends through the elongate member. The channel is in communication with an opening in the second end of the elongate member. The cap is configured to be secured to the second end and substantially seal the opening in the second end.
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