Not require inlet or outlet straight plumbing, or require vertical pipe mounting.

不要求进口或出口直管道, 或要求垂直管道安装.

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When valves are to be used in vertical pipe runs, this should be clearly specified.

如果准备用在垂直管道上, 在订购时应该明确指定说明.

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From the air units, air through the main along the vertical pipe to each layer.

从新风机组送出的新风通过主管道,沿立管送到各层.

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When valves are used in vertical pipe runs, this should be clearly specified.

如果阀门应用在垂直管道上, 这应该清楚指定.

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Swing check valves are used to prevent reversal of flow in horizontal or vertical pipe lines.

旋启式止回阀用于防止水平管路或垂直管路的流体倒流.

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