Unverified90% confidenceDecision RuleTime unknown
膨胀螺栓规格标注M8/M10/M12指螺杆直径，钻孔直径应比螺栓公称直径大约等于膨胀套外径，如M8膨胀螺栓通常需钻10-12mm孔，选购前需确认冲击钻钻头规格匹配
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