以下为句子列表：
英文: All Watts Flow Measurement Devices of this type are supplied with a permanent metal flow characteristic curve which should be affixed to one of the pressure taps on the device using the chain, also supplied.
中文: 这种类型的所有美国瓦茨流量测量装置还配置永久性金属流量特性曲线，记录在压力标签上，用链条附加在装置上。
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英文: Before taking a flow measurement reading, set the valve to its fully open (4.0) or at a preset position.
中文: 在获取流量测量读数之前，将阀门设置在全开（4.0）或在一个预调的位置。
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英文: Care must be taken during installation so that the Flow Measurement Device fitting is concentric with the center line of the pipeline in which it is installed.
中文: 在安装期间必须小心，使得流量测量装置的中心与所安装的管线中心对齐。
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英文: For maximum accuracy, the flow measurement valve should be located in an unrestricted straight pipe run so that no fittings (elbow, valve, tee, etc.) is closer to the measurement valve than 5 pipe diameters upstream and 2 pipe diameter downstream.
中文: 为了实现最大的精确度，流量测量阀应该位于没有限制的直线管道上，在测量阀上游5倍管道直径长的距离内和下游2倍管道直径长的距离内不能有连接件（弯头，阀门，三通，等等）。
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英文: Install the Flow Measurement Device in a straight run of pipe making sure that the flow arrow on the Flow Measurement Device points in the direction of the water flow.
中文: 在管道的直线段安装流量测量装置，确保流量测量装置上的箭头指向水流的流向。
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