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jrs%E5%9C%A8%E7%BA%BF%E8%A7%82%E7%9C%8BNBA(%E6%97%A0%E9%9C%80%E5%AE%89%E8%A3%85)%E7%9B%B4%E6%92%AD%E8%99%8E%E7%89%99%E7%9B%B4%E6%92%AD 施工现场临时用电安全措施规定(设备在5台以下及总容量在50kW以下)
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