The basic flow is a straight line down, while alternative flows are usually the loops going either back or forth.
基本流程是一条向下的直线，然而可选流程可以是向前或向后的循环线。
Flow curve tending to straight line. Excellent regulated performance.
流量特性趋于直线，蝶阀调节性能好。
The straight line, poppet-type construction of the CU7 minimizes pressure drop and provides smooth flow characteristics.
CU7直线管、提升型结构压降最小，流量特性曲线平稳圆滑。
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