Unverified88% confidenceDecision RuleTime unknown
瓷砖墙面钻孔应先用玻璃/瓷砖钻头穿透釉面再换冲击钻打入基层,膨胀螺丝的实际承载依赖砖后的水泥/混凝土层,不能仅靠瓷砖本身受力
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