Unverified85% confidenceDecision RuleTime unknown
瓷砖墙面钻孔需用玻化砖钻头低速开孔并避开砖缝，膨胀管应打入瓷砖后的水泥层≥3cm，仅固定在瓷砖釉面层会导致爆瓷脱落
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