| 摘要 |
An apparatus for accepting a self-drilling screw is provided. The apparatus comprises a base structure having at least one channel. The at least one channel has a first side, a second side, and a bottom, forming a generally 'u' shaped cross section, wherein the first side and the second side are a distance apart such that threads of a self-drilling screw engage with both the first side and the second side when the screw is inserted into the channel.
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