Unverified80% confidenceCautionTime unknown

石膏板吊顶或空心墙不能直接顶装重轨，需先确认龙骨位置或使用专用空心墙膨胀件（飞机型/中空锚栓），否则遮光重帘长期拉扯会脱落——吊顶顶装前务必探测龙骨走向

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