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Building fire in S. Korean city fully extinguished
A fire in a commercial and residential building was fully put out a few hours after it broke out in the South Korean city of ...
消防自救呼吸器一氧化碳防护性能测试仪
GB21976.7-2012《建筑火灾逃生避难器材_第7部分_过滤式消防自救呼吸器》5.5.1 一氧化碳防护性能。 线性误差： ≤±2%F.S 重复性误差： ≤±2%F.S 呼吸流量可调范围：2L/min~60L/min ...
UK issues new junk food ad ban to lower childhood obesity 英国出台新规定限制垃圾 ...
Modern life makes us tired, right? But research from societies in Africa and South America suggests people in the ancient ...