Series a includes steam service for warming up before the main line is opened, and for balancing pressure where the lines are of limited volume.
系列a包括用于在主管道开启前进行加温的蒸汽应用场合,或在流量有限的管道上平衡压力。
Series a includes steam service for warming up before the main line is opened, and for balancing pressure where the lines are of limited volume.
系列a包括用于在主管道开启前进行加温的蒸汽应用场合,或在流量有限的管道上平衡压力。
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