[KongchangAI]
Unverified85% confidenceDecision RuleTime unknown

膨胀螺栓长度需覆盖:固定件厚度+墙面找平层/瓷砖厚度+墙体有效锚固深度(通常≥5倍螺栓直径),瓷砖墙上安装需额外加瓷砖及粘接层约1.5-2cm,长度不足会导致膨胀套未进入混凝土层

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