Unverified80% confidenceDecision RuleTime unknown
钻孔安装瓷砖墙需用玻化砖钻头低速开孔并避开瓷砖十字缝,孔位打在瓷砖中央而非接缝处可降低瓷砖崩裂风险;空心砖墙需用专用中空墙膨胀件而非普通塑料膨胀管
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