Unverified88% confidenceDecision RuleTime unknown
空心砖墙或石膏板隔墙安装置物架需使用飞机型膨胀螺丝（蝴蝶栓）或专用石膏板锚栓，普通膨胀螺栓在空心墙内无法有效膨胀，实际承重会衰减60%以上
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