| 摘要 |
A floor mat has its lower surface formed with one or more abutments located within its perimeter and extending generally perpendicular to the mat. The abutments are arranged to abut against or to be in close proximity to complementary abutments on a detent which is detachably secured to a floor surface, e.g. a carpet, when the mat covers the detent and thereby to restrict or prevent lateral movement and/or rotation of the mat relative to the detent.
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