消防阀门是工业、建筑管路上控制的一种重要附件。
然而经过一段时间后，夏科长发现四楼的一个消防阀门还没有水。
However, over time, Xiake Zhang found the fourth floor of a fire valve has no water.
负责新产品开发以及老产品的改进，包括阀门、管件以及消防栓。
Responsible for new product development and old product improvement, including valves, fittings and hydrants.
据报道，因为管道主阀门在爆炸中已被损坏，消防人员花了几个小时才阻止了煤气的渗漏。
According to the report, it took firefighters hours to stop the leak because the pipeline's main valve was damaged in the explosion.
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