Unverified85% confidenceDecision RuleTime unknown

空心砖墙或石膏板隔墙不能用普通膨胀螺丝，需使用飞机型膨胀螺栓或穿透式对拉螺丝，否则承重会随时间松脱，单点承重要按标称值打5折计算

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