以下为句子列表：
英文: The GAF meters the flow of gas to single or multiple burners. Low pressure drop. Micrometer adjustment. Flanged with threaded companion flange.
中文: GAF记测分配到单个或多个炉头的燃气流量。低压降，微调，具有内罗纹配对法兰。
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英文: The GIPS/GDPS Series of Automatic Shut-off Valves are safety devices designed to stop the flow of gas when the downstream pressure of the valve reaches a value larger than and/or smaller than the preset operating limit.
中文: 升压感应关断型﹞与GDPS﹝降压感应关断型﹞系列自动关断阀为安全设备，设计当此阀下游压力达到大于或﹝和﹞小于预定操作限度的压力值时，来中断瓦斯流动。
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英文: The hydrodynamic experiments with countercurrent flow of gas and liquid simulating the flow conditions in the lower zone of the blast furnace were carried out in a packed bed to clarify the gas pressure drop characteristics in that zone.
中文: 摘要为了阐明高炉下部气相压降的特性，在填料床内模拟高炉下部流动条件进行了气液两相逆流的流体力学实验。
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