UL 268 CRD-2012
火灾警报系统用烟雾探测器的UL安全标准. 节/段落参考: 4.2 (探测器可靠性预测) 主题: 无意中省略的措辞 (第六版: 2009年8月14日)
UL Standard for Safety Smoke Detectors for Fire Alarm Systems - Section / Paragraph Reference: 4.2 (Detector Reliability Prediction) Subject: Wording that was inadvertently omitted (Edition 6: August 14, 2009)