Q641H-17Q 球墨铸铁法兰气动球阀
设计、制造标准Standard for design and manufacture
1.设计制造按GB/T12237-89
2.法兰连接尺寸按:JB/T79-94
1.DesignManafacfure According to GB/T 12237-89
2.FlangeDimensionAccording tojB/T 79-94
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Q641H-17Q 球墨铸铁法兰气动球阀
设计、制造标准Standard for design and manufacture
1.设计制造按GB/T12237-89
2.法兰连接尺寸按:JB/T79-94
1.DesignManafacfure According to GB/T 12237-89
2.FlangeDimensionAccording tojB/T 79-94