Unverified50% confidenceDecision RuleTime unknown
实心砖墙用普通膨胀螺丝即可，但空心砖或石膏板隔墙必须改用飞机膨胀螺丝或蝴蝶锚栓，普通膨胀管在空心墙内几乎零抓力
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Long-term
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