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"atmospheric pressure at sea level is 1013 millibars"
以上来源于: WordNet
N a cgs unit of atmospheric pressure equal to 10–3 bar, 100 newtons per square metre or 0.7500617 millimetre of mercury 毫巴
For cylinders equipped with residual (positive) pressure valves, one evacuation under vacuum at 150 millibar is sufficient if the pressure is positive.
对于装有剩余压力阀门的气瓶，如果瓶内剩余压力是正压，把它抽真空到150 mbar以下就可以了；
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