Read Edit View history 伪顶 wěidǐng false roof Origin Definitions Defs Strokes Stroke Words Sentences Sents created sense approved 伪顶/偽頂 · wěidǐng · false roof 2026/03/04 伪顶 / 偽頂 wěidǐng false roof a thin layer of unstable rock immediately above a coal seam that tends to fall during extraction 在煤矿开采中，伪顶非常容易脱落。 created sense Mar 4, 2026, 02:25 AM