| 摘要 |
A wheel cover has several through holes thereon, and several wall portions encompassing respective ones of the through holes; the encompassing wall portions project from an inner side of the wheel cover and abut respective ones of the edges of the through holes; the encompassing wall portions each have several detained protrusions on an outward side of a tail end thereof; the wheel cover is joined to an aluminum alloy wheel, which has several hollow portions, with the encompassing wall portions thereof being passed through respective ones of the hollow portions, and with the detained protrusions being tightly pressed against inner ends of the hollow portions and detained in the aluminum alloy wheel; thus, the wheel cover is firmly held on the aluminum alloy wheel.
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