这个阀件关不死，请修理或调换。
This valve cannot be closed tightly. Please repair it or have it changed.
吸入装置包括吸入液面至泵进口处的管路、阀件等。
The suction facilities include the pipeline from the suction fluid surface to the inlet of the pump and valves and fittings.
开关柜及照明箱系列，防火阻燃产品，仪表管阀件系列等。
High low wire case series High low voltage tank and lighting box series Anti-firing and anti-combustion products series.
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