标准名称：UL 879 BUL LETINS-2006 The following changes in requirements are being proposed to the Eighth Edition of UL 879, the Standard for Electric Sign Components
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更新日期：2011年10月26日
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UL 879 BUL LETINS-2006 The following changes in requirements are being proposed
to the Eighth Edition of UL 879, the Standard for Electric Sign Components
to the Eighth Edition of UL 879, the Standard for Electric Sign Components
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