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26 天
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 ...
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13 天
车子排气管一根和两根有多大差距?内行说出4点,别被表象所迷惑
首先,我们要明白排气管的主要职责是什么。 它不仅仅是一个简单的管道,用于排放发动机工作过程中产生的废气,还承担着减振降噪、延长排气消声系统寿命等重要任务。
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